Instructions
Select "Create-A-Finisher" from the "Create Modes" menu. Create a new finisher, then select "Front Grapple" as the first move.
Select "Gut Kick" as the second sequence at the default speed (100). There are four more sequences:
Powerbomb Clutch -> Powerbomb Lift -> Jackknife Drop -> Tigerbomb Impact
All are at the default speed.
Preview the move to see if the animation looks smooth enough. Usually you can change the angle, speed and range of the animations to tweak what kind of visual impact they have, which you can handily preview whenever you make a change. Select "Finalize" to accept the move, then name it "Extreme Powerbomb."