There is a fix for this vertex buffer crash bug. There is a new version of Rock legend (1.17) that fixes it. if you re-use the download link you got with the game, that fixes it. if the link has expired, just email me and I’ll reactivate it (cliff@positech.co.uk)
Cheers!
How have you tried contacting me? by email?
If you re-download the game using the original purhcase link it should now install version 1.17, and that fixes this vertex buffer problem. I’ve tested the game on my own windows 7 PC.