Mechforce for me always ran fine up to 3.1. On 3.5 and 3.9 it failed because of the ROM update. I find to play it, I need to boot with no startup-sequence, and manually run it. I too have a 060/PPC/CybervisionPPC card as well as a PicassoIV for the chipset screens, but I know you can promote it from playing with it before. Hope that helps.
