Im putting FS2002 back on my machine and I would like to leave FS9 on for the time being. Can I just do a regular install of 2002 or will there be a conflict between the two programs?

There shouldn't be any conflict. They both don't really share the same files. A lot of users have both on.

Ok thanks... will try the install.

One thing of note..I have both installed and am using the same addon scenery dirs, and noticed as I switch between apps the scenery is rebuilt even if no changes have been made.