Changing files in a bootable ISO

Hi Guys,

	Need some help. I downloaded an ISO (ultimatebootcd)
but some of the items there are either not working or outdated.
I've Dl'ed some of the updates (img files) and I want to substitute
those with the ones currently in the ISO and then burn them into a
new CD.

Is this possible??

mount -t loop /path/to/iso /mnt/iso

what do I do then??

Cheers,                                                 .^.
Mun Heng, Ow                                            /V\
H/M Engineering                                       /(   )\
Western Digital M'sia                                  ^^-^^
DID : 03-7870 5168                          The Linux Advocate