Running both Firefox 2 and 3 on the same computer?

As people who use Firefox may be aware, Firefox 3 is a major upgrade (and a backward step in my opinion) to Firefox 2. One aspect of the program I'm not happy with is the way the history and bookmarks files have been amalgamated. As a result I have stuck with FF2 as I believe it offers a better security feature, namely that I can securely delete the history without bookmarks being wiped also.

My other half wants to use Firefox 3 and wants to install it on the computer! She likes the features it offers - the very same features I don't like!

I have read that it is possible to install and run Firefox 3 alongside Firefox 2 and there are instructions on the net on how to do this but I can never get both to run in their own ways - Firefox 3 always runs when I load Firefox 2. Has anyone got both running on their computer and if so can they provide a simplistic explanation of how they achieved it? It looks like I may be forced to acquiesce and install FF3 and give up on FF2 otherwise...

We have our own user accounts but Firefox 3 loads on both user accounts.

Thanks!

Just grab Firefox 3 Portable, may not be the most up-to-date version though:

http://portableapps.com/apps/internet/firefox_portable

Or just get her her own computer, lucky for me my wife barely uses mine, but I do have to race the kiddos to them sometimes......:)

I installed FF2 and FF3 on the same machine way back when. Just put FF2 in a different directory and linked it..worked for me a while ago :S