I think the thing with HP is it keeps the default HP, so if you change a Marines HP to 4 in the Unit and Hero Settings, it wil have 40/4 HP.
QUOTE(axblader)
aw darn...i have to go redo half of my map cause xtra wont read forge data
X-tra and stuff don't support sprites, so if you have sprites in a map you are editing in X-tra, have multiple copies of the map, one with sprites. Then, import everything into the one with sprites using the importer found
here). I find it always crashes StarCraft when I import the sprites into the map, =\ Anyways, you can also place sprites when you are done editing the map in X-tra.