Thanks to the Stack Overflow community ... and a little research I was able to get my favorite editor, EditPad Pro, to work as the core editor with msysgit 1.7.5.GIT and TortoiseGit v1.7.3.0 over Windows XP SP3...
Following the advice above, I added the path to a Bash script for the code editor...
git config --global core.editor c:/msysgit/cmd/epp.sh
However, after several failed attempts at the above mentioned solutions ... I was finally able to get this working. Per EditPad Pro's documentation, adding the '/newinstance' flag would allow the shell to wait for the editor input...
The '/newinstance' flag was the key in my case...
#!/bin/sh
"C:/Program Files/JGsoft/EditPadPro6/EditPadPro.exe" //newinstance "$*"