[solution in post #5!] I've got an old MacBook laptop that I'm looking to sell and am having trouble clean-installing OSX on it. It had 10.6 running already, and I ran an upgrade installation to get it on 10.7. From here, I tried booting into the Lion recovery wizard and clicking the "reinstall Lion" button, but I keep getting stuck on the "enter a user id and password" screen. In an effort to bypass this, I was hoping there might be a way to use my Lion DMG image inside of this recovery environment and just clean install it that way. I went into the disk utility and mounted the image successfully, but couldn't open it in the file explorer because you don't get to use that in the recovery environment. I tried opening the installer from the mounted image through the command line, but just got some funky error. Is there a way to either bypass the "user id and password" or run the lion installer from the mounted DMG image file? I'm just trying to clean install here. Thanks.