Glad you were able to find a set up code that worked.
"Advanced codes" is a way to program additonal functions onto keys on the remote. Odds are that your unit supports this feature since it is a One-for-All branded product -- even if it is not described in the manual. But you first need a listing of the advanced codes for DVD 651, since they are unique to each device code.
To learn more, you can go to Rob's site
www.hifi-remote.com and check out the "advanced codes" section which has a more complete description and instructions on how to use them. If Rob doesn't have the codes for DVD 651 posted, then you will have to call or email One-for-All customer service with your remote model number and request a listing of the DVD 651 advanced codes.