I tried mke2fs -t vfat but got back a comment that the drive must be unmounted. I tried to unmount the drive and got "command not found" again.
I rebooted and reran mke2fs -t vfat, and it worked.
Thanks for your help.
By the way, This install won't display 1920x1050. I had an earlier version of lenny installed on the same machine that did display 1920x1050. Any ideas?
I'm not too keen on some of these new-fangled automatic features.
Thanks again for your help.