all you are doing is setting the device "name" in the build.prop file to another device so that Google Play will let you install apps that are "incompatible" with the connect but ARE compatible with the phone you put in. BTW I am curious, what phone did you put, what games are you trying to play, and how do they run (as Ive only seen a few games that wont run on this phone and most are Tegra versions of a game)
EDIT: BUT if you install another ROM, you will have to RE-edit your build.prop as the new ROM will wipe out all your tweaks