I have a dying server with GW 2012

In the past to move to new Server in a new Tree I've used the Graft method

Can I simply copy the GW files (PO & Domain) - which I've done already to the new box and install GW on the new box
then associate with the Directory ?

I don't want to risk add to the existing flakey server ie. keep the files as 2012
IF I CAN HELP IT !

any gottchas?

How would you do it ?