Applications :: Safari 4 Not Working - UGH

I downloaded this: [URL] to add the "tweaks" menu. After I downloaded it I had some trouble getting it to work. I originally just dragged the contents of the folder (not the folder itself) into where it is supposed to go and that didnt do anything. So then I redownloaded it and dragged the folder itself into it, that didnt do anything. then I got rid of the orignal Menu.nib file and it caused Safari to not even start. After retrying a bunch of times I eventually got it to work. Once I got it to work I clicked on the "view webless ct" tweak (or whatever it said) just to see what it was, and viola, Safari wouldnt load. Everytime I try to open Safari now, I got an error message saying safari needs to quit.

I even reinstalled safari, didnt work. THEN I threw the installation .dmg file in the trash, as well ass safari it self into the trash and emptied it. Then I used firefox and redownloaded Safari 4 from apple.com. After downloading and installing safari 4 again, restarting the computer, it STILL shows the error message. How can I get safari back to work? I really dont like Firefox.