[tfarhood]

John, if you have ever changed drum brake shoes on a car before, this should be easy for you. If not, it still isn't hard but you may not have that comfort level to be at ease. The toughest part about the replacement isn't the parts, but rather the adjustment of the shoe pressure. The cable adjusters are inside the shifter boot, but they have limited adjustment. The real problem is that the e-brake handle doesn't have optimum travel/leverage, therefore the shoe adjustment inside the drum must be set as snug as possible before putting the rotor back on the hub. My e-brake still needs to be re-adjusted after the new shoes have set-in, but I'm just too lazy lately to do it.
As for a diagram, just pull the other side off, it is a mirror image of the other one.
You can get new shoes from BMW or you can shop e-bay and save a little. Just look for E-36 e-brake shoes. If I find my paperwork, I'll post the part # and the phone # where I got mine. Good luck.