USB boot from HardDisk

[Jonas Geiregat <jonas@geiregat.org>]

Hello,

I'm aware the subject may sound confusing. 
So let me elaborate the subject some more.

I have a computer currently running Ubuntu linux. I'm quite fed up with 
this distrobution and would like to switch to Debian GNU/Linux.

This computer has no cdrom-drive also, for some reason (probably
something went wrong with my motherboard) I can't boot directely from an
external cdrom-drive or a usb pendrive.

But if the computer starts I do get a grub menu from the Ubuntu
distrobution. Would it be possible to use this grub setup from Ubuntu to
boot my pendrive usb ?

Kind regards,

Jonas.