Yes - I have installed the patches and made sure my Windows xp was up-to-date along with my video drivers and the Directx drivers. I have a 1.4cpu with a 40gig hd and a Gforce 5200 with 128mg video, so I know my pc can run this. Like I said, I can do a "save" with no problem, but if I try to rename a model or do a "save as" the program crashes and I need to restart it.

Aaaaah good old Norton's seems to have been the problem. Although I'm really not sure because I did a reinstall of the Windows xp os. However, disabling Norton's Firewall and Anti Virus software seems to have cleared up the problem. Thanks all for the support.