So I was sitting here this morning sipping my coffee and I had a major head slap. Now that we know both screen types work (if using the alternate recovery.img method), I think we can avoid all the downgrade stuff. Once you are rooted and have a working recovery, just download the "s-off" file and apply it like a rom in recovery:
http://unrevoked.com/rootwiki/doku.php/public/forever
The file is located under the "Installation Instructions" section in that link.
It says to rename it update.zip but you do not have to do this. Leave it named as is, place the zip on the SD card and load it via Clockwork:
-install zip from sd card option
-choose zip from sd card option
navigate to the unrevoked forever s-off zip and load it. If this works, it should simplify the process a great deal.