It doesnt depends on CoD2 or CoD4, just on the mod.
Your tdm-spawns are only working, because you teleport the activator at roundstart into the activator-area (you wouldnt need that, if you just use sd-spawns).
I prefer sd-spawns, because:
- save the work of trigger + script
- activator/runners arent spawning for short time in the same area, so he cant be killed in the first seconds of new round
The trigger-at-spawn was a really nice idea though