Detailing large weldments killing my PC

Many of our weldments are over 70 piece parts. Detailingweldments that big is killing my PC.  Anytips? .

I know that leaving the views shaded can help withperformancea bit.  But I can't leave them shaded all the time.

Using SWX 2007 SP4 on a P4 dual core, 2 gigs ram, Quadro FX1500video card running XP.

Thanks
Paul.SolidworksDrawings And Detailing