Message from Abysia

[Agrajag]

Well, since we are given control over the age of units using mod commands, it shouldn't be very hard to nullify the aging mechanism with a simple mod.
Something like:
Selectmonster 1
MaxAge 10000
Selectmonster 2
MaxAge 10000
...
Selectmonster 1500
MaxAge 10000
...

I'm just making up command names though, since I don't know the max age commands and don't remember the unit select command.
Either way you could write a script to write that for you quite easily.