Well I done the dukeplus conversion for FM2X and Outpost X. I have posted them at 3D Realms forums, a while back.
I might try to make Nostromo work with Duke Plus, if I have time. Lately I tried to learn some con coding, because I wanted to fix a bug in Duke64 mod. By the way, Duke64 mod v1.31 is out.
I don't know if Duke64 mod is allowed here, thus I will not say more.
If I fix Nostromo for Duke Plus usage, I will let you know. It mustn't be very hard to do it.
[edit]
NostromoPlus.con attached
usage: eduke32 -game_dir DukePlus -jnostromo -hdukeplus.def -xNostromoPlus.con -map nostromo.map
Note: All Nostromo custom sounds are enabled