How I can make USB Drive an Active Partition ?

[Mir96TA]

I was following how I can install Win7 off USB drive WebSite
But I got stuck at point where it talks about Diskpart
That's where I can tell they are talking about some body is doing off Vista OS.
Cause when I do Dispart with List disk I do not see my USB.
From CMD it says
do following
DISKPART
Select "my USB Drive"
I do not see my USB drive.
So I can't format or make the partition Active
Any hint ?

 

[Old Hippie]

Note that this bootable USB guide will not work if you are trying to make a bootable USB on XP computer.

 

[Mir96TA]

I am looking for a soloution not have an echo on my POST