It's a bit tricky because some of these games keep their movies on the CD.
Aside from that, for all games except Blood, all you need is the .GRP files, the intro movies for Redneck Rides Again and Powerslave/Exhumed and the CD Audio music for RR, SW and Exhumed. In the case of NAM, though, the main .CON file is not in the . GRP and also needs to be copied, but that's the only exception here.
For Blood, NBlood has a list of needed files here:
https://github.com/nukeykt/NBlood That doesn't include the movies and CD Audio, though, which need to be copied separately.
For Duke World Tour I recommend not messing with it at all, it's too easy to delete some necessary files.