All I know is that I was working on getting my Vista machine up and running with VMC. Then I installed GameEx. Once that was ready, I went to update the mame rom list, and it appeared to just 'hang'. After 30 minutes or so, it was still just sitting there. So I tried to ALT+TAB but couldn't switch because of GameEx's always on top deal. I can't remember if there is a "always on top" flag option in the settings, if not there should be. Anyway, I ALT+ENTER'd to get it into a window and noticed there was a 7zip window running. It was prompting me for the extracted destination folder. After hitting 'ok' on the default location, GameEx suddenly woke up and went on to the next part. It looks like every single file it "grabs" from somewhere while building the list is calling on a destination request from the user. The catver, mameinfo, etc. Once all the files were extracted, everything went through ok. Now that I think about it, this might have only happened the first time. I've not updated the rom list since then, so I can't really say for sure if it ALWAYS happens. Plus, I am running Vista, which might also be an issue. I just recommended it above because it worked for me. <shrug>I dunno...</shrug>