Windows – How I do to modify the contents of a ISO file?

I want to open a ISO file, add files and then burn it to a disc.

By example, I get the Windows98 SE boot disk. That ISO have 2.6mb, and if I burn the iso, I will lost the remainder 697mb of the disk!

To burn the ISO, I use CD Burner XP or ImgBurn, but I don’t know which free tool I can use to add/remove files before burn.

Thank you very much!

Solution:

You can use MagicISO trial version. It’s has a 300 MB ISO size limit for the trial version. But it is still worth to try I think. It is still bootable after editing, I’ve tested it.