I downloaded the ISO file into my "Downloads" subdirectory.
I have only one drive that uses "removable" disks..., that would be drive E: in my case. The C: drive is partitioned to create drive D:.
Since the output from the ISO file has only one way to go, I merely double click the ISO file, and the CD/DVD is automatically burned.
Then I can use the optical disk whenever I need it.
The ISO file remains in my Downloads directory. I clean out this folder periodically.
I did manage to create a few CDs that my XP computer could boot from. Each of these disks served a specific service for my XP computer.
You need to be sure that whatever you download is of service to a specific operating system..., in my case Windows XP. So, you can create disks on a Vista machine that are meant to execute on a XP computer. In this particular case, I had to avoid
executing any of these XP programs on my Vista PC.