I see many people asking how to save the Lion installer, and ofter the way to go is unpacking the installer and saving the disk image.
In my case, I saved the whole installer app (the same as downloaded) in an external disk before installing it in my iMac. Now, can I just copy the installer to my MacBook Pro and run it with no trouble? Or should I burn the disk? I don't really intend to burn it now, using the installer would be more practical.