Hi,

I have hacked a GH1 with this hack and am looking to buy a GH2, so which is the simalar hack and is the procedure the same?

The hack is about the same but I've never owned a GH1 so I don't know about that specific patch. You might want to look at LPowell's Flow Motion. It looks about right.
100Mbps Flow Motion v1.11 Failsafe Patch with HBR 25p & 50p modes - Personal View Talks (http://www.personal-view.com/talks/discussion/2099/100mbps-flow-motion-v1.11-failsafe-patch-with-hbr-25p-50p-modes/p1)