help required with step 2 of Universal USB installer,

Hi

I downloaded Universal USB installer and I have it running but I'm stuck on step 2 .

I selected Mint in step 1 'select your Linux distribution from the drop down menu',

and

step 2, which is: 'Select your debian live.iso',

so I clicked browse and it opens my download folder which doesnt contain any iso.

What should I do?

I'm using:

XP

firefox