I was able to get the stock ww2 lift to work via a switch. When the player gets on nothing happens but when the switch is pressed the lift works as normal.
For this get the lifts "main" script and add in the "activated=1" condition in the line where it has "associateplayer" as an action. From here you then go to your Wiseman's script and locate his animation/talking region, at the point after his animation add the "activateifused=1" action. You may need a bit of extra code to get the timing just right but this should work. (Put the lifts name in Wiseman's ifused field)
Sorry for not providing snippets as the code I used was FPSC's stock script and I dont have access to yours to modify. Best of luck!

2S!K Productions