What's the problem exactly?
Blender 2.49b + the old .dts exporter handles animations for Blockland just fine. And the new Blender functions basically the same as the old in terms of animations, unless they redid how animations are handled under the hood?
The issue is that any animated object in Blender will always be controlled by that animation, despite being out of keyframe range due to the way extrapolation works. This makes animations bleed into each other, mess up in general, and make defining the default node transforms impossible.