I'm halfway through making a mod and I start to modify or make a new weapon or armor and my computer locks up..now my computer doesn't do this often...it's usualy only when I'm running the toolset..and it never crashes during the game..so I'm wondering if anyone can help me, if so..please write me.

Do you have the latest patch installed?

I'm going to suggest going to the Bioware boards and asking in their self help trouble shooting forum. From reading those boards alot, it seems the toolset crashes for some people for a variety of reasons. I'd find out specifics about your system, drivers you're using, and game version you're running first, though, to make sure you're giving people all the info you can as to why it's crashing.