I have an answer for those with the hero cdma 1.56 roms.
There is a update.zip file which has the the #superuser.apk white l, and busybox in it ( since the whitelist program from market has cdma hero issues)
Once applied, it changes the uid to 0 as required.
I just flashed it and can confirm that it works.
The update is described here:
http://forum.xda-developers.com/show...ight=mercado79
download update.zip here:
http://forum.xda-developers.com/atta...1&d=1259860872
This is for stock cdma hero roms only.