mkisofs - file order

[calyco]

Im trying to make a VCD of some clips I have downloaded. So I do:

mkisofs -o mydisc.iso /path/to/files

I want to have my files burned like so:

video_01
video_02
video_03

but it keeps starting with the last file eg:

video_03
video_02
video_01

How would I put the video files in order?