Alsoġ0.7 came both on USB Flash drive and Mac App Store installer versions.
The retail installer disc will not work on that model, nor will one from another age MacBook Pro, or other model labelled installer. Mind you, any 2011 MacBook Pro must use the original 10.6 installer disc labelled MacBook Pro if it desires to have 10.6 installed on it.
You should be able to install Mac OS X 10.7 or later on your 2011 MacBook Pro without issue, if it came with 10.6.3 as your signature suggests.