One major change for this update, is I've totally revamped the IED system (after testing the old setup, it seems it wasn't designed for multiplayer/dedicated server so didn't do anything!... I've now replaced the IED setup with a much simpler yet working system).
WARNING: IEDS are now randomly placed on the roadsides around the map. IEDs are randomly set to use a variety of charges, some small some large. The IEDs maybe hidden in the ground, in car wrecks or other objects. Vehicles or infantry can set IEDS off, so keep your eyes open!
Currently the best way to disarm them is with a explosion (ie grenade/m203), the object will be remain in place but the explosion will disrupt the IED from going off, so you can travel by. (this area needs testing and some development)