Join Date: Oct 2005
Location: Ponte Vedra Beach, FL
Programs: DL PM, HH Diamond, Fairmont Prem, SPG Gold, Priority Club Plat/IC Amb, AmEx Plat
Posts: 10,839
Entering a different FF number is something that you can't do on DL's website. It is annoying as other ST members allow you to do it without a phone call.
You will receive priority boarding. Usually in Zone 2 or 3 (as always Zone 1 if you're flying in F).