Skyblue is right, that's an awesome book. I refer to it here and there, but certainly wouldn't mind doing without for a little while (month or two) if you'd like to borrow it. PM me if you do.
Just remember there are two kinds of Cholesterol: High density which is HDL (think of high density as being firm and bouncy) and low density or LDL (imagine these being soft and sticky)
LDLs being the 'sticky' ones, they go around and adhere to vein and artery walls. These are the ones that clog arteries, and cause heart attacks and stuff. The HDLs are actually the ones that help by going around and collecting some of the LDLs. So you want your LDLs to be low, and the HDLs to be well, i guess high. (you should have a good ratio in other words, but the LDLs can be in the 100s and the HDLs in the double digits above 50)
cholesterol comes from saturated fat. Hardly any of your body's cholesterol actually comes from cholesterol you've consumed. CHolesterol is a product your body makes from the saturated fats you consume. Now think about the fact that animal products are where just about all saturated fats come from. In fact, there are very few plant-foods with saturated fats in them period. (avocados, coconuts... that's all I can think of, but there are some more)
HDLs are made the more you excercise. It's about the only way to naturally gain HDL points. Some studies have been done to show that Niacin (a B vitamin) aids this as well as a daily glass of red wine. Sorry though, I don't have links.
My doctor is always impressed with my levels. My total cholesterol at last reading was 153. LDLs were 115 and my HDLs were 38. HDL is actually low, but is not a concern given the ratio, and the overall LOW level of cholesterol.
I attribute that to the fact that I prefer whole grains, eat no meat, and exercise a couple times a week, but am otherwise very active. (a brisk walker, a tidy house, a full day, etc. etc.)
I say get the whole family involved. Make very little meat, go for daily walks or something. I dunno what would actually work well for you and him, but I'd think that making him not alone in his efforts will help get him motivated, and the whole family would benefit anyway.
Put him on a program where he has to try one veggie a week or somthing. Once you find one he likes, have it cut up in the fridge at eye level. Keep fruits washed, make some low-fat (esp saturated fat) dips for veggies if need be. Make salsa and get baked chips. Salsa is definitely a veggie, belive it or not.

Move the cheese and any snack meats to somewhere inconvenient. Put all kinds of healthy choices where they are easy to get at and will grab his attention (kind of like when grocery stores put the kids cereal at shopping cart level). and make sure they are pre-prepared so there's no fuss involved to get in the way of him eating it.
I know this post was in ramble format, hope some of it helps anyway.
