Even if you dont understand its really simple, Basically download CCAPI Debugger @
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If you use CCAPI 2.50 download this and replace the files in here to the files from the debugger (PS3.Lib +CCAPI.dll)
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Then when you load fifa in the range put 51000000 - 52000000
Then in the value make sure to put how much money you have in your manager mode career (E.g. 25,000,000) then search, you should see the offset, click it then change the value to whichever you may want it to be. Works on the latest update.