Get hold of a computer with vista or Win7.
Format the usb drive in NTFS format.
open command prompt, start-programs-accessories-cmd.
Type the following commands without quotes and press enter.
"diskpart"
"list disk"
Now note the disk no of the usb key, disk 1 or disk 2. Be careful while selecting the disk. Use size as reference.
type the following in sequence
select disk 1 (where disk 1 is the disk number of usb drive)
active
list partition
select partition 1
active
exit
Now insert you disc.
From cmd, browse to boot directory the disc drive.
G:\cd boot (where G: is the drive letter of the drive)
Now, when u are here, type this
g:\cd boot\> bootsect\nt60 h:
where h: is the drive letter of the usb drive.
Now exit cmd.
copy all files from the disc to the usb drive.
Then boot from the usb drive.