Rory:
To my knowledge: DSKs ONLY cut on and off, thus can not be latched to do a wipe transition.
Jason is correct in his statement[QUOTE]regardless of the installed options you would be able to do a wipe with keys transitioning on an ME with "regular" keys ---- in saying that, if you could use whatever your keying with the DSK as the top layered keyer on the pgm/pvw bank then you could "latch" the keyer(s) with the background and then preform a wipe or dissolve.
refer to the ops manual:
Vision Ops Manual ( section 7 )#Vision