Camcorders: Directional microphone for Sony DCR-SR62?

Directional microphone for Sony DCR-SR62?

I'm a n00b.

Been using my camcorder, and I dig it, but my audio is terrible. I'm recording in a big, crowded room, and a speaker is at the front of the room, I'm with the camcorder in the back. I'm about 40 feet (give or take 10 feet) from the person-speaker. The person-speaker is using a clip-onto-your-shirt microphone pickup, and that goes out to the speaker system - which is just two smallish speakers in the front of the room - one to the left and right of the person-speaker.

My audio on the tape just picks up everything - especially close to the camera mic - my breathing, my or anyone chatting, chairs moving, coughing, distant sounds from the kitchen way off to the side, etc.

I know this is a fairly standard problem, and I was hoping, but not expecting, that it would be pretty easy to find a microphone. I got the SR62 specifically so I could add some stuff if I needed to - well, now I need to add some stuff. But I'm very confused.

Where does this microphone connect? I see the boot/mount where a mic might sit on the camcorder, but is that it? Are there any other cables involved? A lot of mics seem to require 'Audio In' connectors. My camcorder only has an 'A/V out' and a 'remote' (which looks lie the place you'd plug your headphones into) - whatever you'd use those for.

The bottom of the line $50 mic appears to be a piece of junk, but at least it looked reasonably easy to install.

So, the question - can I buy any directional mic and have it work? I guess I have an 'active mount/boot' - does that mean there are no other plugs involved? What is the corresponding technical marker I need to look for on the mics themselves - I can't seem to find any. Or are all microphones just automatically compatible with every camcorder?

here is a link to my fly camcorder:
http://www.amazon.com/Sony-DCR-SR62-Handycam-Camcorder-Included/dp/B000M3JQIW

Thank you much!