so after having to learn a lot about how to use VI and how to edit and save files using VI i was able to fallow this guide up to the part about installing xbmc 

http://npapak.blogspot.com/2013/04/how-to-install-raspbian-and-autostart.html

I am at the step of 

The user which you're going to run XBMC as needs to be a member of the following groups:

will be compelling the other steps tomorrow 

I have had never used VI before sense i am a still very new to linux if you want to learn more about VI here are the guides i used 

http://www.lagmonster.org/docs/vi.html

https://www.washington.edu/computing/unix/vi.html