Use Cyberduck to install...
Install MobilePPF.app under:
/private/var/mobile/Applications
as user mobile (default password is alpine).
The 2 command line apps are for MobileTerminal and need to be installed under:
/usr/bin
as user root (default password also alpine).
Follow some tutorial to jailbreak your iOS device if not done allready.
The 2 command line apps are built with a custom iOS 3.1.3 SDK I built myself...

Download including sources:
http://rapidshare.com/files/451202573/MobilePPF.zip