Here's how it goes:
Initially you simply put a classified ad in the L.A. Times. "A-Team. (phone number)". Pro tip: You may want to advertise for "AAA Team" in order to ensure that your ad appears before all of the other A-Team ads. Also, replace 'phone number' with your actual number. Those two tips will put you ahead of 90% of the other A-Team requests.
You will be contacted at the number provided and given a time and a place.
There you will be approached by a portly man with a wig and a false nose. He will try to sell you a hot dog. He will try to sell everyone in the park a hot dog. Presumably all of them are people who placed ads.
The ones who buy hot dogs discover that there is a message wrapped around the wiener. It directs you to the center of the park where there is a gigantic ice-cream man dressed as a child and wearing approximately forty pounds of gold jewelry, as ice-cream men are wont to do.
Get in line with all of the other candidates. Might as well enjoy the hot dog while you wait. The stick on the ice-cream bar, after you eat it, directs you to a taxi being driven by a con-artist. He will later use your credit card to purchase hair care products.
Provided you have met whatever mysterious requirements they were looking for the taxi will take you to a field where you will board a helicopter piloted by an insane man. For mysterious reasons, the ice cream man will be unconscious and stowed in the baggage net behind the seats.
There the hot dog man, now dressed as a lizard, will reveal to you that these people you met were actually the A-Team all along.
At which point you should thank them for their time and say you'd like to think about it and get some second opinions.
I hear The Expendables are available.