Yes, with Yahoo Plus leagues you can enter the entire leagues keepers long before the draft. Then, when the draft begins, the appropraite players are on their correct teams.
Having tried it the way you describe led to horrible results for us. We wasted many a Yahoo league trying to make it work, but someone would always mess it up, which effectively ruins the rest of the draft.
"Ya'll are brutalizing me!" - Ronwell Dobbs