you can do it.
Just have the game open while you edit it. And find the alignment issues.
Unfortunately, i can't run Gmod and Blockland at the same time, especially with Torque Constructor, it really slows this PC down and it's too hard to work with then :(
I can't do this on the Vista PC anymore, cause the map apparently got 'too complicated' for Torque Constructor to handle due to that computer only having a 1.90 Ghz processor where as this computer has a 2.80 Ghz :l