Mike I'm not 100% sure, but I believe that your problem lies with your vanilla install. You appear to have installed W2K with SP3 to make the install mirror your live system, but I think the mistake you have made is to also install IIS. You should not install IIS as this means that it is running during the restore and therefore does not allow certain .dll's to be overwritten.
It appears from your post that you are backing up the dll's and they are on the TSM server, but when you try to restore them, your vanilla OS won't allow the current dll's to be overwritten, as IIS is running. I believe the answer will be to reinstall your vanilla OS without IIS. Hope this helps. Leigh