system mechanic instalation problem

Thanks to all that have helped i've gotten my system working so-so again. Anyone have any ideas on how to over come a problem i'm having installing system mechanic. When i try to install the program from the cd i get an "invalid license information" error messege. I contacted the company and they said to start the system in safe mode with networking and install from safe mode. My problem is that i have an Nvideo G force graphics card installed with my factory graphics card disabled and when i start in safe mode it tries to use the factory graphics card and my monitor doesn't workand switching to the monitor to the factory card at that point only lets me see the pointer. Will i have to remove the G force card and enable the factory card (which is part of the mother board) or is there a way to work around this problem? And again thanks for all the prior help i have gotten from ppl - it realy helped.