http://www.quaketastic.com/upload/files/models/mushroom.zip
Took a few minutes extra to upload. Probably gonna look at the gravestones next (but not straight away).
On some of the other models: The twisted tree would be really cool, I'd like to make it, but I think I'd spend longer than an hour on it, get the whispy bits animated properly etc. The hanging lantern would be doable, but without a flame inside - adding that would take longer but probably would bring the model together.
Some skull/bones type things would probably be doable, the trick is probably to make skulls that are very low poly so you can have lots, and also to make the skins match the pile of skulls/bones textures in maps - so you could have models to top off a pile of skulls brush with a bit of extra detail. Piles of books would be fine to do, the trick would be striking a balance between detail and polygons.
I guess all the mechtech torture models had to be removed from his pack then? They'd be static at least...I have no idea how you'd make a cobweb which would work in standard quake, I've thought about it before. Finally, I have a grass patch model on the back-burner right now, so watch this space...