custom in game dunks

how can I preform custom in game dunks and passes behind the back? I saw that in some videos on official site... I have PC, but also I have joypad like one on X-box 360...
and is there possibility to do some street moves on nba blacktop?

the street moves are done by pressing clutch and turbo at the same time then pressing pass

dunks...well, there isnt much custom about them, just go into practice mode and flick the right stick in one of the 4 directions relative to the basket

and fancy passes are done with good passers and holding turbo when passing

Thanks on informations!
But how I can do through the legs and 360 dunk in game?
Take a look @ video direct upload january top 10...
http://2ksports.com/games/nba2k10

i believe fancy dunks are flicking right on the stick relative to the basket

but to do 360's are to flick the stick into the upper left corner. It works for me.

Basically try different directions in practice mode while attempting a dunk.

From the manual-

Basic Dunk - Right stick toward basket
Power Dunk - Right stick to the right of basket
Flashy Dunk - Right stick to the left of basket
360 Dunk - Right stick in full circular motion (good luck with this one on pc)

Didnt somebody officially confirm that 360s dont work?
I was spectical the first time I read it, I mean how can you then adjust your shot?

Push the right stick in a direction to adjust your shot. It works but only for dunks.

hey i finally did a 360 windmill dunk on PC.... but i only did it once and never to replicate the move again.. i wonder... i didnt do any wierd keyboard press... i just run and dunk