Making a Debian Bootable USB Pen Drive

[Nuno Miguel dos Santos Baeta <nmsb@simplesnet.pt>]

Hi!

I want to install Debian in a USB pen drive.  My first problem is, how 
big should the pen drive be according to the following options:

1st option. Minimal system with some networking tools.

2nd option. 1st option + X with FVWM.

Thanks!

PS - There is only one reason for me to post this question:  I don't 
have an available computer to make install both options and check the 
needed disk space :-|

--
Nuno Miguel dos Santos Baeta
ille nihil dubitat quem nulla scientia dictat