1. SHH to /private/var/mobile
paste the 'bitesms_4.1.deb' file

2. Open 'MobileTerminal' (on your iPhone/iPod)

If you don't have Terminal, goto
Cydia - Search - MobileTerminal
and install MobileTerminal


3. In Terminal typ the follow:

a. cd /private/var/mobile

b. su

c. password is: alpine

d. dpkg -i bitesms_4.1.deb

SWITCH OFF your device NOT reboot or respring to avoid the pirate-screen