Installing multiple versions

Hi, I have limewire pro and limewire basic. I want to use pro and put basic on another windows xp account. But everytime I try to do this it deletes the previous version. Like I even installed pro on my desktop and it ran fine. Then I switched accounts and installed basic on another account desktop to and it still over-rode it. Any suggesstions?

I know I find it annoying to, I have my old pro version and wanted to run a newer "nagware" version, but cant do it, so I stick with the old Pro version, and run a new Firefox version as well.