I have a move i made a little while back, i came back to edit it and added a lot more, i want to add one more dm preferably a decap can someone help

You aren't so new anymore, should this go in the Replays section now?

good point......

a way to get more dms is to set turn frames to 1...thats wat mad mans use

I don't.
I use shift+space.
Cba to put turnframes into 1.

Instead of setting it to one keep editing the bit you want the dm frame by frame instead of the whole replay.