In my experience as a GM (not of Dresdin Files, but in general), this is two distinct issues.
If it's not in the books, it can't exist
You can't let him just dictate things in this case. Based on this question and BESW's helpful comment, it's best to try and build a consensus with him rather than just dictate how things shall be... but in the end you have to take into account the game that you want to run and what's going to be fun for all of the players. Not just him. If you let him simply dictate what can and can't exist, nobody else (including you) is going to get any input into it.
If he can accept that, great! If he really can't accept that, then maybe it's best he not play. Sometimes players and a GM simply can't coexist in the same game, because their expectations are so different that there's no way to reconcile them. Hopefully this isn't one of those times, but it does happen. That doesn't mean that either of you is wrong, simply that the type of game you want to play in isn't the same.
Other Players 'bend to his will'
This... may or may not be a problem. We'll need more information.
One of the things that happens in player groups when someone has more game knowledge than other players is that the person who knows everything often becomes a defacto leader. Some people are better leaders than others. The good ones use their knowledge to help everyone play and get good outcomes for the party. The poor ones act like bullies and get everyone to do what they want "because they know better".
Since you haven't had a play session yet, I don't think you can honestly answer which one he is. I certainly can't, based on the information available. :)
Another issue is that some player types simply aren't as concerned about the rules, and will go along with what other people want just to get past arguing about that and get back to playing. For those players, going along with him isn't a bad thing and isn't bothering them - they just don't care about the outcome of that argument.
I have a player like that in my current D&D game who is happy to let the players who know the rules argue about them, and takes advice from those players on what to do in combat situations. I talked with her directly to make sure she was enjoying herself, and she is. She just doesn't care to learn the rulebook cover-to-cover and is happy to let the people who do know it handle that stuff. When the party starts dealing with in-character issues of what to do or who to talk to, she is a lot more engaged then when someone is arguing about the mechanics of some rule. That's just as valid a way to play as anybody else, but it can look like she's being bossed around, in fact she's perfectly happy to let someone else handle that aspect.
What to do?
As I mentioned, you'll need to talk to him privately about these issues. If you're concerned about the other players feeling bullied or steamrolled by him telling them what to do, you'll also need to talk to them privately.
Lay out your concerns to him directly, and explain how you intend to run the game. Let him know that you're interested in what he has to say and will accommodate it where you can, but that as the GM you can't let him simply dictate everything by himself. See what he says to that, and go from there. A lot of players are pretty reasonable when you have an honest conversation with them about these kind of problems.