When I work with Windows Application in VS 2005 I do the following:
1. I need to make some changes and do not want to lose the original code - I copy entire folder of my solution let's say MySolution1, name it as MySolution2.
2. I double click on MySolution.sln file in the folder MySolution2.
3. I always have files located in MySolution2 folder associated with my new
copy of the solution
4. If I make any changes in the solution I have those changes in MySolution2 folder.

I tried to use the same approach with WEB project (File based). I see the
files from my old folder in a new solution. I can change the location of
files associated with a new copy only by opening sln file in Notepad and
making changes there.
Is there any way to change FullPath property of the file automatically when
I open a copy of the solution, saved in a new folder? Maybe there is some
option in VS environment?

Thank you
Vlad