which is why you would just use zip and zip up all your data and then throw it on a cd or use UDF. :) ISO has had enough extensions and it's got some crappy limitations like filename length among other things. UDF is the way to go for the future. i don't know of a modern OS that doesn't support UDF already other than BeOS. you can trudge along and make some extension. then if you don't modify makeiso you're going to have to create at least one other program and probably heavily modify an ISO driver. all the ones for BeOS that i've seen have some pretty bad shortcomings. (for example they don't support level 3 where you can have fragmented files which are becoming more common thanks to directCD). i think you may spend a good deal of time attempting to hack the ISO driver to provide this functionality. valuable time that could've been spent elsewhere, IMO. i think the better alternative is to have someone spend time writing and improving the windows and linux drivers or maybe make a btools portable program that's similiar to mtools and ltools. i posted a GNU version of the NT IFS SDK a few days ago. it's free. then in this process we modernize BeOS by giving it UDF support finally and inrease it's interoperability. however this is just my opinion :) -soco