F3,4,5 are basically the same in terms of function.
HD,PVR, now and next EPG etc
They just have different style cases really.
F5 is smaller and neater but won't do anything
extra. I bought the F5 for that reason.
F3 bigger but cheaper.
Will PM you later with line details
when I get home unless somebody else
does.
You could always post a request for one
here skyla normally gets back pretty quick.
If you order an N line the instructions on how to enter
it are further down the F3 tutorial posted by BoxT
Just assume the posts under the F3 section
apply to the F5 too.