changing files in iso images

is there possibly a way to alter/add/remove files from within an iso image quickly without having to go though the whole process or remaking the entire image taking like 20 so minutes for a dvd image

20 minutes? I can create an ISO of a bunch of vob/ifo/bups files in about 2 minutes with CloneDVD. Its hardly worth the effort 'trying' to find a tool that can manipulate the ISO you already have. The only tool I can think of that 'might' be able to do it is something like UltraISO.

well you must have a pretty dam fast hard drive like a scsi or whatever no way a normall ata-100 can write a 4+ gig file in 2 mins

hehe, yeah I do have fast scsi hdds actually. Still....3 minutes isnt 20 now is it :) The main thing is to have/use 2 hdds. Have the files on one of them and write the ISO to the other. Never do it to the same hdd or you'll be there all day!