NBA 2K6

What I did was put all of my sliders up except injury. Then put it on rookie. Put all of the away/cpu sliders down except for the tendencies put those towards the top. Pick the west all-stars for you and make them the raptors. Then in the game all I did was use Kobe Bryant sunk threes all day and got about 100 points just with him. Then after you get 10 points steal the ball (RS) and pass to a teammate and have them score. Do that 10 times and you got yourself a triple-double. 10 points,10 steals and 10 assists. (Rebounds is also another thing you can do.)

To get a triple double, you need double digits in three of the five major statistical categories:

Points
Steals
Rebounds
Assists
Blocks

you have to get at least 10 pts in at least 3 of these categories: Points, Rebounds, Assists, Steals. the easiest way to do this is to go into the options menu and go to game slider and crank all of your stats up and lower the stats for the AI. then start a game as one of the 100% teams and play against the worst team. you should get all achievements in one game

For this achievement you need to get 10+ points in 3/5 of the following categories with one player:
Points
Steals
Rebounds
Assists
Blocks

Firstly as you will have already done you want the user sliders set to max (Bar injuries) and the CPU sliders to minimum.
At the same time go into the NBA Rules menu and turn the following OFF:
Shot Clock
Out Of Bounds
Backcourt
8sec Half Court
3 In The Key
5sec Back To Basket

Now with these rules off pick the player you want to get your triple-double with and get possession of the ball, make sure you steal the ball from your opponent at least 10 times.

With possession of the ball run () into you half of the court and behind your net making sure to stand in front of the pole for your basket, press the button to shoot which 99% of the time will hit the back of the basket and land near you, this counts as a rebound even though it is off your own net. Now run to the opponents net stand in the 3 point zone (Outside the red line) and hold to shoot (With the sliders all the way up you will always score)

Repeat this a minimum of 10 times with the same player and you will have you 10 rebounds, 30 points with one player and 10 steals with one player giving you a triple-double, though it is advised you go for 20 rebounds to gain the other achievements.

You will also get the following achievements whilst going for this:
Score more baskets till you have 140 points and the game will also be complete.

You can check the stats by pausing, going into Game Stats - Home Team.

Here's a video showing the rebound method.