Where to buy Windows 7 Software

[fazersharp]

I do a lot of work with photos and my main reason for not upgrading to 7 was because of a problem with sorting images.
If I have 50 photos and want to rearrange the order by drag and dropping - win 7 wont let me. Say I want to move photo 5 to position one in win 7 I have to first rename photo 5 to photo 1 --- but wait I cant because there is already a photo 1, so I have to first rename photo 1 to photo 1a.
In xp i just drag and drop move around to the order I want - select all - rename the 1st number to 1 and the whole lot will be renamed sequentially