what's cm7.2 MiRaGe based off? Trying to instal an app for 3.0 & up

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http://androidforums.com – I flashed the MiRaGe ROM and it's awesome. Just wondering which android is it based on since I'm trying to install Greenify *ROOT* but it says it's for android 3.0+ and I couldn't find what's the android ROM behind mirage. Anyone knows a trick to get it installed? The mirage works wonderful. (General)