ne time i try to make a map n try to play it... it crashes and i try to make another one it still crashes! i use scm toolkit and sc xtra editor
You're probably placing units that crash SC, using something invalid, etc.
I dont like SCMtoolkit, it screwed up some of my maps. Use starforge instead. Here is the solution to your problem:
Open Xtra Base Editor and use that. If you use that, the chances of crashing are minimal.
Look for units extending OFF the map. If you cant see the whole unit on the map in the editor then you have a problem.
la.... but starforge is relly slow... ne one kno how to make it faster?
Get a better computer.

What is your specs anyway?
The specification of your machine. Hardware stuff, like CPU, Hard Disk, RAM, etc.
He won't be able to answer that either...
I use Xtra Editor and ive ran into the problem a couple of times, there a couple of symptoms... a few you guys have already said like Unusable units such as the Independent Command Center, other are unit extending to far off the map, Another is to many units bunched together as if your using the Special mode of Xtra editor.
Hmm...
I've had that problem. For me, it was corrpt locations,
What do you mean by Corrupt locations?