is there one yet for winbin. if there is could someone send it to me, or give me a link to where it is.

or do i have to use tunercat

Well I searched for one but came up empty. There is something you can use.

http://www.diy-efi.org/gmecm/ecm_info/1228746/8746.dsm

This was from the patch method demo in the sticky posts area. It is in my opinion better than just an ecu file. A lot more difficult to use if you just want to tune stuff but it has so much more information. All you need is a hex editor and some patience. You could use it to make an ecu file. Or just buy tunercat like you said.

Here ya go
Check out ftp://ftp.diy-efi.org/incoming
Look for 8746jonprevost.ecu
It's probably what you're looking for.