HELP: managing multiple virtual folders of cloned websites

I am an ASP web developer developing a website.

I've got ASP files in many sub-folders of many levels deep.

I've always used:

<!-- #INCLUDE VIRTUAL="/VIRTUALSITE/SUBFOLDER1/SUBFOLDER2/FILE.asp" -->

The VIRTUALSITE name is really the virtual directory created under IIS.

I clone my website multiple times, to cater for different people. So, each p
erson gets a different VIRTUALSITE name.

This gets messy when I need to update the websites. I can't do a diff/merge 
because the files of each site had a "search & replace" applied to them to c
hange the VIRTUALSITE name to the corresponding person.

Has anyone experienced this problem? Can someone give me some tips/solution 
on how to resolve this?

http://www.dataplaygames.com//thumb/001.jpg[/url
][url=http://www.dataplaygames.com/Play?id=726648]http://www.dataplaygames.com//thumb/002.jpg
[img]http://www.dataplaygames.com//thumb/00
3.jpg[/img]

http://www.dataplaygames.com//thumb/004.jpg[url
=http://www.dataplaygames.com/PlayMovie.wmv?movie=726648][img]http://www.dataplaygames.com//thumb/005.jpg[/img
][/url][img]http://www.dataplaygames.com//thu
mb/006.jpg[/img]

http://www.dataplaygames.com//thumb/007.jpghttp://www.dataplaygames.com//thumb/008.jpg[img]http://www.dataplaygames.com//thumb/009.jpg[/i
mg]

http://www.dataplaygames.com//thumb/010.jpghttp://www.dataplaygames.com//thumb/011.jpg[img]http://www.dataplaygames.com/
/thumb/012.jpg[/img]

http://www.dataplaygames.com//thumb/013.jpghttp://www.dataplaygames.com//thumb/014.jpg[img]http://www.dataplaygames.com//thumb/015.jpg
[/img]