Thank you AndyHull and JerseyMo for responding with really helpful instructions! You guys rock! i have to get some rodic to help hold these two little mini-monsters in place. I was trying to use a small bit of sticky-tack but it didn't hold well enough. I would get the screw into position but it would fall over when the screwdriver touched the screw.
For the 24 movement that still has the broken screw end in it, I will try to get that out after I get the lever and screw installed in my working 24.
And yes, I will install the crown/stem AFTER I have the lever and screw in place on the plate. Again, thanks for your help- i really appreciate it!!! Will let you know when I get things back together.