Latest update: I was able to boot to the service menu after disconnecting everything, letting it sit for a bit, then putting the battery back in. I downloaded the NAND image from the TriSoft website, and it allowed me to restore that one. Not sure why it didn't like the image I created directly from my machine, but hey, it worked.
I restored a backup from a recent backup file I took, and am back in business on the Sharp ROM. I still need to install Tetsu's kernel, etc, but it is working at least.
I'll be sticking with this for a little bit before trying another image. Thanks for the help, Marc!!
shane