I think they do not have copy protection in the CDs. I have "UltraISO" to create .iso and .cue files. Old DOS games were not copy protected.
I think "Time Commando" have CD audio tracks but UltraISO can create .iso file with all tracks easily. If you install this game on HDD and use a cr@cked .exe, not having the CD inserted, the music doesn't play but game works.