When I first got Vue4 I was using a three-year-old Pentium II 400mHz w/500mg o' ram and a 16mg video card. Vue ran perfectly as long as I used the Wireframe view in all the view ports. OpenGL would freeze it after a few minutes of work. If turning off OpenGL doesn't work for you, I'd try Vue in a different, more muscular, machine. If you can't find one to borrow, there are places that will rent them to you. If this job is that important, it may be worth it.