interesting stuff..
I just did the mod with a wintec 32g CF :
http://www.newegg.com/Product/Product.aspx?Item=N82E16820161369&Tpk=wintec%2032g%20cfused the the 7pre4 bootload, firmware version 3.7.1, all works out well..
I don't know if this has been tried before, but i put an older version from a v.6 bootloader, daily build from 5/07.
I wanted to use my old settings/fonts/ and most importantly the REP.
So, after completing the mod, i then made a backup of the new version, and copied the older build files to the CF. when i disconnected, it was running the old-timey rockbox like a champ!
REP is back in style.
Cheers!