Re: My Husband Checks Out Women So Much, Plz help me!!!
I feel very bad for your situation. I'm trying to think of solutions, but I can only come up with a few:
1) when you are not actively arguing about this topic, you can bring up the islamic principle of "lowering the gaze", so that perhaps the fear of Allah will make him stop. I know people look, but what is bad is that he tries to constantly sneak a look. So it's not an accident, it's conscious, and the sneaking part means he wants to continue to look and feels no guilt about it. So when he does that, you can quote the quran. And if he says he wasn't looking, just say "u have to explain to allah, not me".
2) Do the same to him. Unfortunately, you cant do option 1 and option 2, b/c then you seem like a hypocrite. So when there's an attractive guy, just look at him and maybe even get distracted during a convo with your husband by looking at the guy. Or even chat it up. Then when he gets angry, ask him why he's angry, and he'll understand how disrespectful his behavior is to you.
3) When he does it, say something like, "yeah she's pretty cute. Ok, can we focus here now?" or "really? her? I'd say she's more like a 4. Anyway, back to what I was saying..." Like don't ask whether he's staring, or accuse him of staring, b/c that's confrontational and will lead to argument. THis way, it's not like he's gonna deny it, and you end up sounding like "whatever, let's move on", not emotional, insecure, and jealous.
4) Involving inlaws - this was put out there, but i guess it really depends on his family. If you're gonna do it, your best bet is to talk to his dad if his dad likes you. he may help get the message across, maybe share some of his wisdom.
Personally, I think option 1 is the best way to go about this, it changes something inherent in him. I hope you are able to solve your problem, stay strong.
[P.S.: make sure he KNOWS what you do in retaliation] 
Good Luck 