Changing plays, defence mode and players

[jochenaox]

Hi

I'm new to NBA live 07 just got it yesterday. I've got a question.
I bought the game mostfully to manage teams (so Dynasty mode).

Now i'm playing with the miami heat.I've gotten staff and gotten to the first few matches wich i won. I always watch the game so i don't controll the players and just let the cumputer controll mine to.But when in the game i'd also like to change the offensive and defensive plays.For example i'm losing with 4 points and i'm in the 4rth quarter, then i'd like to set my defence to full court man to man press. and maybe i'm down by more so i'd like to take my chance on 3-points offesively.
Where can i do so?

And where can i take players off the court during a game?
For example i'd like to take O'neal off and put another player on the court.

Is this all possible in NBA live 07? or should i get 08?