You can install/buy ROM Mamager and flash the latest recovery from there [the ROM Manager developer ,develops the recoveries too
,no worries] and then go to DOWNLOAD menu in ROM Manager and search for [I really recommend this one !] CyberGR MOD [CM7 mod : modified CM7 latest [2.3.7] stable v22.214.171.124 with BLN : ON and other stuff ,very good !!] download it [only premium !!] and install it !