As long as you don't have any problems getting an ftp session, here's how to do both of those steps with ftp:

cd /etc/preinit.d
site rw
bin
put B10tts
site chmod 755 B10tts
site ro

type each of those lines at an ftp prompt after you've connected to your empeg and that should do it.

Were you able to upload all the .pcm files?