Backtrack assumes that you as the user can write your own documentation
seeing as BT is for EXPERTS by EXPERTS for EXPORTS to use
experts are assumed to be using BT
you might want to have a look at the old BT4 tutorials and port them for use on bt5
http://www.backtrack-linux.org/tutorials/
( this task is also to be amused that you can do )
a "new to Linux" friendly distro like ???? say LinuxMint
might be a WAY better choice of OS
but if you MUST use BT5
then i suggest that you take the " Offensive Security " online training courses
http://www.backtrack-linux.org/infor...sive-security/
http://www.backtrack-linux.org/infor...training/live/