Nvidia has published the ForceWare 158.19 beta for Windows 2000/XP and the ForceWare 158.18 for Windows Vista. If they work with the GeForce7 if you have a modified inf file, these drivers are officially only limited to the GeForce 8.
This new version supports cards based on G84/G86 (8400, 8500 and 8600) and features a long list of issues corrected. Nvidia also announced higher 3D performances, an improved user interface and the support of PureVideo HD which is unfortunately currently limited to Vista.