'56 Door Rebuilding Primer

[Truckhead]

I bought a '56 very recently; I have to work in the 2 doors, the glass is cracked, the felt is shot, etc. I have never done this.

Is there a special publication showing details on doing this? I thought the shop manual would have details, but either they didn't or I missed it.

Should I be scared to do this?

Would it be easier to just go to one piece windows instead?
Best ones?

I noticed there is like an interior thin door shell around the windows, etc. Is this supposed to be able to come out, or should I somehow re-affix it tightly?

Thanks for the info.

Paul