Old. We have a tutorial on this I believe.
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Oh, it's not in the tutorials database... but it CAN be found here:
http://www.staredit.net/index.php?showtopic=1885QUOTE(Sprite-Units section)
Advanced Sprite Properties
By: Ðeathknight
(1) Use Starforge
(2) Place any unit.
(3) See the unit type in the properties box.
(4) Copy that number.
(5) Delete the building and place any sprite.
(6) Go to the sprites properties.
(7) Put in the number of that unit you had before in the "Sprite" box.
(8) Uncheck the draw as sprite box.
(9)Check the "Disabled??" box.
(10) In the game it will be determined on what number you have used. You can see the list I've made below for reference.
NOTE: ALL SPRITE CREEP CAN NOT BE BUILT ON BY A DRONE UNLESS THERE IS REAL GAME CREEP THERE
LIST OF NON-CRASHING DISABLED SPRITE-UNITS:
•SCV(Acts as if it is mining or attacking and a spark appears in the top left hand corner)
•Drone(acts as if it is mining in place)
•Marine, Jim Raynor(Acts normally but doesn't move or attack)
•Ghost, Samir Duran, Alexei Stukov, Infested Duran(Acts normally but doesn't move or attack)
•Command Center(Is half built, it will have the lift icon, provides supply)
•Nuclear Silo(is half built, it will show the number of nukes it's holding)
•Refinary(is half built, you can gather vaspene gas from it, if it's destroyed, it will leave a vaspene geyser that you can walk under like a sprite and you can build on it)
•Barracks(is half built, will show the lift icon)
•Academy(is half built)
•Factory(is half built, shows lift icon)
•Starport(is half built, shows lift icon)
•Control Tower(is half built)
•Science Facility(is half built, shows lift icon)
•Covert Ops(is half built)
•Physics lab(is half built)
•Machine Shop(is half built)
•Armory(is half built)
•Missile turret(is half built ####ed-up looking)
•Bunker(is half built, load icon is there)
•Uraj Crystal(Acts normally but can't be picked up)
•Khalis Crystal(Acts normally but can't be picked up)
•Hatchery(Provides control, has select larva icon, provides creep)
•Lair(Provides control, has select larva icon, provides creep)
•Hive(Provides control, has select larva icon, provides creep)
•Nydus Canal(Provides creep, has build exit icon thingy)
•Hydralisk Den(Provides creep)
•Defiler Mound(Provides Creep)
•Greater Spire(Provides Creep)
•Queen's Nest(Provides Creep)
•Evolution Chamber(Provides Creep)
•Ultralisk Cavern(Provides Creep)
•Spire(Provides Creep)
•Spawning Pool(Provides Creep)
•Creep Colony(Provides Creep)
•Spore Colony(Provides Creep)
•Sunken Colony(Provides Creep)
•Overmind(with shell)(Provides creep)
•Overmind(Provides Creep)
•Extractor(you can gather vaspene gas from it, if it's destroyed, it will leave a vaspene geyser that you can walk under like a sprite and you can build on it)
•Mature Chrysalis(provides creep)
•Cerebrate, Cerebrate Daggoth(provides creep)
After I kept crashing on many protoss buildings, I assume they all crash.
•Xal Naga Temple(It's a flashing shadow. If you move the mouse over it or see the whole thing, the game will crash)
•Mineral Field(Type 1)(Says hallucinated, when you click on it, it says "base is under attack", can be mined)
•Mineral Field(Type 2)(Says hallucinated, when you click on it, it says "base is under attack", can be mined)
•Mineral Field(Type 3)(Says hallucinated, when you click on it, it says "base is under attack", can be mined)
•Psi Disruptor(Is invisible, if the whole thing is seen or you move the mouse over it, the game crashes)
•Zerg beacon, Zerg Flag Beacon(Acts like a regular beacon)
•Terran Beacon, Terran Flag Beacon(Acts like a regular beacon)
•Protoss Beacon, Protoss Flag beacon(Acts like a regular beacon, is not disabled)
•Overmind Cocoon(Provides creep)
•Dark Swarm(spell)(Normal, makes no sound, dunno about the attack thing)
•Floor Missile Trap(seems normal, not disabled)
•Floor Hatch(Remains opened, not disabled)
•Left Upper Level Door(Looks like a line, probably down)
•Right Upper Level Door(looks like a line, probably down)
•Left Pit Door(is down)
•Right Pit Door(is down)
•Floor Gun Trap(seems normal, not disabled)
•Left Wall Missile Trap(seems normal, not disabled)
•Right Wall Missile Trap(seems normal, not disabled)
•Left Wall Flame Trap(seems normal, not disabled)
•Right Wall Flame Trap(seems normal, not disabled)
•Start Location(Has 800/800 health with 1 thingy on the health bar filled in, sais hallucinated, when you click on it it sais "base is under attack", has a blank portrait)
•Flag(Not disabled, can't be picked up)
•Young Chrysalis(Not disabled, can't be picked up)
•Psi Emitter(Not disabled, can't be picked up)
•Data Disk(Not disabled, can't be picked up)
•Khaydarin Crystal(Not disabled, can't be picked up)
•Mineral Chunk(type 1)(Not disabled, can't be picked up)
•Mineral Chunk(Type 2)(Not disabled, can't be picked up)
•Vaspene sac(type 1)(Not disabled, can't be picked up)
•Vaspene Sac(type 2)(Not disabled, can't be picked up)
•Vaspene orb(type 1)(Not disabled, can't be picked up)
•Vaspene orb(type 2)(Not disabled, can't be picked up)
•Vaspene tank(type 1)(Not disabled, can't be picked up)
•Vaspene Tank(type 2)(Not disabled, can't be picked up)
•Goliath head, Alan Schezar head(number 4 on the list)(not selectable, spins around)
•Larva(Selectable, spins around, can't morph)
•Mutalisk(is a rock sprite then crashes after a couple seconds)
•Dark Templar, Dark templar(hero), Zeratul(Selectable, spins around, no action works)
•Dark Archon(As soon as it morphs in, the game crashes)
•Archon, Tassadar/Zeratul(As soon as it morphs in, the game crashes)
•Interceptor(turns into a rock sprite, doesn't crash)
•Scarab(Disappears)
•Map Revealer(turns into a rock sprite, doesn't crash)
•Disruption web(looks pretty normal)