heres the link to the thread i used. it worked flawlessly. im also using vista64 and what i did was symlink the 4 slaves to the main data file. thats 5 installs spread over 2 drives as well and it may not be the best way to do it. im not sure if it will help if youre only running off of one drive. the thread pretty much says it all you have to read more than just the first post though it gets cleared up better further down the line. and like ugh said it probably wont help if the lag is constant as opposed to periodic.