Pulling down players from DII is not hard and in fact it is a very smart strategy. However, just because a player is listed as DII doesn't automatically make him better than a DIII player. You must compare and evaluate because often there are some real gems in DIII that get passed over. That said, the pulldown process starts with a simple phone call to either the player or player's coach. One call is all that is needed. You will receive feedback that will tell you if you can pull down the player or not. If you do not get a reply from the player, that means NO. If you get feedback that makes reference to you being a backup option then you can pull him down. If he says stop calling that means NO. No means no chance. He will never change his mind.
Once you get the backup email, then send him 10 Scouting Visits and the schollie. Do not attempt to send HVs, CVs, or offer minutes or a start because he will reject them. You can offer those later once he is considering you. Sending 10 SVs is usually enough but sometimes you need to send more. I prefer to send additional SVs in groups of 5 but other coaches may vary. Once he is considering you, continue to recruit as normal.