Im pretty new to backtrack and linux in general, but i've been trying to set up a boot install for backtrack with windows 7 as my main OS.

i don't know whether im missing something or just being a noob, but as far as i can see according to the tutorials, on the partitions setup page there should be three options for installing BT,

Guided - resize the disk,
Guided - Use entire disk,
and manual.

for some reason the first option doesn't appear for me and i cannot figure out how to use (or find tutorials on) setting it up through the third option. Not sure if this is my computer's problem or the option is simply not supposed to be there and the tutorials i have seen are from older versions of Backtrack :\

any help please?