To those with old (pre 1.0b52) versions of QuickSilver, that stays in the Dock no matter what, and who don't get a connection to blacktree.com, here's the latest version of QuickSilver, that works with Leopard: http://www.macupdate.com/info.php/id/14831
I did a fresh install, and had my documents backed up. Now, due to QS's website being down, I can't install modules, and therefore cannot control iTunes etc.
If anyone would be kind enough to upload or provide a link for any of these, please PM me:
Extra Scripts
iTunes Module
Address Book Module
Safari Module