holy crap! i did it!!
so here is what i did:
renamed email.apk and email.odex to *.bak.
tried to install googleemail.apk. it installed.
tried to run it, and it it ran. crashed almost immediately. almost locked the phone up, but it recovered.
i backed up the original email.apk before i renamed it, so i ran the restore from root tool box. original email wont run now either
so i press forward. i completely uninstall the *.apk.bak files as well as the touchwix exchange services. then installed the excange services from myu Nexus backup... and voila! its working! im tied back into my Gmail and exchange accounts, desktop widget and all!
man i hope this works stabily (ill need some time to test it of course), but the touchwiz email was just so annoying, always flipping from the unread emails to the ones already read (why would i scroll DOWN to unread emails???)