[Help!] Editor problems, yet again

[Flan]

Ok so im still trying to set up this dirtbike and i have recently switched computers. trouble is that on this computer when i try to do anything to do with a soldier in the editor it crashes after giving the red warning of something about two or more weapons in one slot. This happened before i modified anything so I don't know what to do. Sorry i cant quote exactly what it says but when it crashes it locks the screen and you cant see the whole red text line. Is there a way to change the default soldier used, as i have always had problems when using the specops kit.

Other thing is that when i try to test my dirtbike ingame it crashes when loading objects. I have very nearly finished the project but this has been a bit like hitting a brick wall.