I ran the .bat, it said 'press any key to continue' and...nothing. Gave it several minutes. (At least my phone appears normal, if unrooted.)
For my Epic 4G, installed the 32-bit Samsung drivers on WinXP SP3, which took a few connects/disconnects of the cable for all the new "devices" to be recognized with debugging unchecked, then ran the .bat as instructed.
The only unusual thing besides that is my COMODO Security program of course popped up when I ran the .bat, but I allowed it so, is there something I should do besides run it again?
Thanks to all, good to finally participate here.