Windows & & CS2 help

A little over a year ago I bought a new computer which came with Windows 7. I had no problem loading my Adobe Creative Suite 2 onto the system - it worked great until we got a virus. This virus wiped out all my pictures which were on an external harddrive and messed up a few programs including CS2. I understand that CS2 & Windows 7 are not compatible however they worked together pre-virus. Now I can't get the program loaded - I know there must be a way. Adobe customer service will not help with anything prior to CS4 and purchasing/upgrading is not an option (financial hardship) right now. Can anyone give me some tips on how to get this back on my system?
Thank you ~