It should work on Windows 7 with VueScan.http://www.hamrick.com/
I would recommend a v750. You can wetscan with it for the best results. Dry scan using the neg holder frames is excellent to.
There are also some custom film holders to get your negatives flatter.
Here is an example of a 6x8cm dry scan.
I used Silverfast software (that comes with the v750).
The math behind Silverfast is great, but I do not like the interface or the company.... and their censored forum.
Software lacks profiles for new emultions so you have to make your own. Some of the supplied profiles are real junk.
Negafix their negative scanning utility can get terrific results, but it is fiddly as hell and the curve editor is small.
I really don't understand why these idiots can't make the curve editors larger or simply scalable.
There really should be an option to have it overlaid on the image and full screen.
Wow, a stunning portrait. Great job.