Actually, I was looking for the md5sum for rc4, not an md5sum program. I just like to check it because sometimes downloads get corrupted, or a flakey CF card may corrupt the file. Anyway, for those who don't yet have an md5sum program, Thanks!
I have not been able to get a tar.gz of the files asked for. Can someone give me another way to do that other than the way Guylhem posted above. I just keep getting the above-mentioned errors. (tar: creation of compressed not internally supported by tar, pipe to busybox gunzip). I have not yet installed rc4, as Guylhem wanted those tarred-up directories from the Sharp rom (/etc, /home/etc, /home/zaurus, and /opt/Qtopia/etc.) to work on the network icon bug.