How do you call a scene from a scene without using a program?

I currently have 2 3-way scenes where I use 1 Keypad button and a separate switch in a 3-way operation.  This already works correctly.  Now, I want to use a 3rd kepad button to trigger both of these scenes.

The application is that I have some lights over my bed.  1/2 controlled by one 3-way circuit, 1/2 by the other.  While I sometimes want these controlled separately, other times I would prefer to have a single control that would activate all the lights.

I tried to create a scene with the 3rd button, and then drag the other scene into it, but the UI didn't let me do that.

I tried to add all 5 devices (3 KPL buttons and 2 dimmer switches) to the scene, but it seemed to complain that the devices were already controllers in other scenes, so it wanted me to configure them as responders.

I tried to group the 3 KPL buttons together, and this kinda worked (meaning the 3 KPL buttons correctly linked), but the 3-way operation with the dimmer didn't work. I thought that since KPL.A worked with the scene to turn on Switch1, that if I had a new scene with KPL.A, KPL.B, and KPL.C, if KPL.C turned on KPL.A, it would also trigger the scene that KPL.A controlled

Thanks.

Edited March 2Mar 2 by snazareth
Add more clarity

You can't have a scene trigger another scene (though it can be done with a program and using the Virtual plugin). Instead, you should simply create a new 3rd scene, that involves all the lights that you want it to control. Individual lights can be responders to dozens of scenes if you wish.