ok, i ll make an easy step by step turtorial for you:
1)Download a model. (i attach a model for you to test)
2)Open a warcraft map
3)open the import manager (shortkey is F12)
4)click 'import file' (shortkey is Ctrl+i)
5)for the test model ballista i attached doubleclick the file BallistaAnimated_E_1.mdx
6)open your object editor
7)select a unit and change the model to the imported model
8)Save your map
9) !Important! Close your warcraft III world editor
10)start the world editor again and open your map
11)now enjoy the model of a ballista in your game
Credits for the model to HappyTauren
Downloaded the model at The Hive
Finally finding about some of the bots that are flooding the users online - bytespider apparently is a huge offender here - ignores robots.txt and comes in from a ton of different IPs
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.