The easiest way to get a ken combo is 2 steps. Fair->Dair. there is an easy way to practice this. Go play a lv 1 comp with infinite time in melee mode. Get the comp's percent up to around 70-80%, and then fthrow them off the edge. They will try and jump back on the stage. Not the ledge, but the stage. When the comp is in the middle of trying to jump back up, jump off the stage and do a fair, then jump up again and do a dair. After your dair connects, move the control stick in the direction of the stage. If you do it right, you won't even need to use your up b to get back on the stage. Then, your basically ken. Speaking of Ken, he's probably watching this thread, so why don't you help him out buddy and tell him how to really do a KEN combo.