Hello.

Although possibly not related to your problem, I have to remind you that the version of Firefox you are using at the moment has been discontinued and is no longer supported. On top of this, it has known unpatched bugs and security problems. I urge you to update to the latest version of Firefox, for maximum security, stability, performance and usability. You can get it for free, as always, at getfirefox.com.

As for your question, hopefully this support article is what you need:

http://support.mozilla.com/en-US/kb/Profiles

You'll notice that you can access all your info, not just the bookmarks.

To locate the Firefox profile folder on the old drive, see:

http://kb.mozillazine.org/Profile_folder_-_Firefox

If you just want to restore your bookmarks you can use the "Import and Backup -> Restore -> Choose File" feature of the Bookmarks Manager and select one of the bookmark files from the profile's bookmarkbackups folder on the old drive. See http://kb.mozillazine.org/Backing_up_and_restoring_bookmarks_-_Firefox