Just kill that wc3mapimported\ from all the .blp files, restart the WE and it should work it did for me. I am working on a Starcraft in Warcraft map, so there will be a lot of the paths there.
For the Lurker burrowed attack thing, Give a Lurker the Bear Form ability,and edit it so its like burrow.Have its alternate form be a unit with a burrowed model.Give the burrowed unit an attack of either impale (under abilities,4-6 spikes)or the buff impale (1 spike) Hope it helps