This is second additional, original author approved update/fix of the Roland's rtnp conversion found here nowadays:

http://www.rolandunreal.ismywebsite.com/unreal/rtnp.htm

You can rename the maps to originals and overwrite them, or use custom mutators or gametypes like dzmapm, tpmutator, jcoop, etc etc to link the maps together.

The fixes include: 

MPDuskFallsF - Scout ship fly sound was put back

MPEldoraS - Skeleton put back, warpzone fix by roland was disabled (as he added additional L shaped corner to make it not teleport players back when stepping through the problematic warpzone, however that turned out as not seeming seamless and it didn't make sense if you paid attention to detail)
instead a new solution was made, the entire end level part was rotated to the same direction as the first warpzone, so online it won't do crap. Also I had to reanimate the mover because the keyframes were at wrong locations. Also a bird added to the first outside area, the bird was originally a bit above the sky so it always fell out of the world.

MPEldoraSb - map is unchanged from roland's version, only skeleton added, added just for backup purposes.

MPGlathriel1S - added skeletons and changed explodingwall, nuff said

MPGlathriel2S - added skeletons again...yawn

MPNaliC2S - added nali skeletons back again...no other change

Fixes provided by Leo(T.C.K.)