Okay...
Jailbreak, done.
MKK, done.
KUAL, done.
Created extensions folder in root directory, copied Skipstone and Leafpad folders to it. KUAL did not see them. I noticed that the folders were Skipstone/Skipstone/contents and Leafpad/Leafpad/contents, and thought maybe it didn't recognize it that way, so I tried just Skipstone/contents and Leafpad/contents, but no luck.
Also, I was looking through the Tools list, and saw KOReader. I thought my daughter would be thrilled to be able to view these other formats on her Kindle, but I'm not sure which file I need -- the one with "gnueabi" in the filename, or the one with "gnueabihf"?
I'm not going there until I have the other two things working, though.