Originally Posted by Lord of the Rings

Perhaps try http://www.gnutellaforums.com/333278-post2.html but I think for Vista you still need to set installer to run as Admin. Vista can be a PITA afaik. Last alternative I can think of which does not include actual installation is: Download ‘Other’ version & simply unzip & use! (but again, set the program to run as Admin. I think for vista)