The most recent version would be kept out on the
Gimp Plugin Registry <<== Click here!
It's written in python so you'll need to have python install on your OS. And since you're a windows users you'll need to follow Rod's instructions for correctly installing python on a windows OS. I pasted in the link below!
http://gimpchat.com/viewtopic.php?f=23&t=2277Make sure you follow those instructions to the 'T'
The Resynthesizer once you unpack it and you'll need 7zip cause windows doesn't know what to do with a .tar.gz file. Unpack that into your c:\Documents and Settings\<what ever your username is>\.gimp-2.6\plug-ins
That should do it! I've never played with the Resynthesizer at all. Good Luck!