Need a little help with FF Portable, Sandboxie, etc.

I currently have a full install of Firefox 2 on my computer and designated as my default browser. I've just started using FF 3.5.2 portable concurrently with that install of FF2. So now, I have a few questions because of having both versions:

1) Because FF 2 is my default browser, how do I get FF 3.5.2 Portable to open under Sandboxie?

2) For the FF extensions that don't install directly from the Firefox Add-On menu itself, how do I point a *.exe extension install to the right version (the portable version in this case), so it doesn't re-install in version 2? (An example of this would be McAfee Site Advisor -- or Roboform)

3) Lastly, how do I get all of my bookmarks from FF2 to FF Portable?

1. Maybe this might help? Clicky!

2. Download the Addon (to a place like your desktop) >> Open Firefox Portable >> Go to Add-ons, then the Extensions area >> Then drag & drop the addon you downloaded onto the Extensions area and it'll install.

3. Make a backup from FF2, and import that backup into FF3. (Use the FEBE extension, as I don't think FF2 comes with a default bookmark backup option).

Thanks for all the help, Icedrake. Not sure how I missed the how to change the "default browser," but I did.