I think it'd be really cool if you could dock Fractal Audio's Axe Edit (or any other external program for that matter) in Reaper. It'd be nice not to have to switch back and forth between windows
I don't think an app can host another app's window unless they are both designed that way but at least you can place their windows side by side or open the other program on another monitor if you have two.
Oh, jeez I wasn't thinking about loading it onto another monitor haha I do plan on having dual monitors in the future, didn't cross my mind just to be patient haha thanks man