Some of animated people (from this http://neoklai.ucoz.ru/load/8-1-0-37 pack actually) have trainz-build 2.5. This build causes them to not appear in TRS2004. Could you make an update with trainz-build changed to 2? I know I can change this in config myself (I've already done that). But some TRS2004 users may not know how to make the assets work correctly.
I've tried to send an email to Neoklai, I'm not sure if he got it, because and error message that I didn,t understand (i don,t speak Russian) appeared.