Also did you download nDoom from the first post in the topics of this sub-forum? Because those are from Ndless 2.1. You must download it from TI-Planet.
(Maybe it would be a good idea if critor put it in Omni downloads section too, even if it links directly to the TI-Planet download or ticalc.org)
I downloaded it from the first page, I'll check if the one from TI-Planet works.