Dromeus,
"Yes John, that's what I will do in the future. I will copy the source style to the root of the USER drive, then selecting it from Style Assembly is just two actions, select USER drive, then the style. Still a workaround, but saves a lot of time."
You shouldn't even have to select the user drive, the process keeps returning you to the actual copies of the Style files in the user drive.
Regards, John