ef86d000 ef89f000 vjrrtptt vjrrtptt.sys Sat Aug 16 07:23:10 2008 (48A6C6AE)
This is in the minidump, and was later removed from the system. It is part of a rootkit labeled as Rootkit.agent.
Once this was removed, the windows installer worked again. All other attempts at unreg/rereging or reinstalling installer completed, but it still didnt work.
Possible that this was causing the bsods as well?