Well...the first problem stuff makes it sound like you didn't reboot. If you did reboot and all was well you wouldn't have a start menu anymore. If you did reboot that means that your registry changes weren't correct and you should see the install docs.

Im going to guess that you tried to install LS on XP64 or some beta of Vista. If you did then you need to go back and read the XP64 thread under LS Builds.