Is it possible?

Right now i am just having windows on a partition that are 288gb big...

And i want to encrypt the full windows xp OS with the pre-boot-autentication thats comes with drivecrypt...
But i also want a dual boot and install backtrack 3 with grub if that is possible.

I have read this link..
keitin.net/jarpatus/articles/dcpp_grub/

and this:
keitin.net/jarpatus/articles/safeguard_easy_grub/index.shtml

But that sounds a bit hard for a "begginer" like me...but i did install ubuntu a few days ago, but decided to remove it, and grub, with fixmbr with windows cd...

Anyways. If i encrypt the whole windows partition. Can backtrack recognize the partition anyways and install itself there..
And then maybe chainload something in grub...

hmm...i gotta think about this and plan before i do it...hopefully with some help of you experts.

thanks!