Enter the Matrix

Use the LOGIN command with the guest account to open the B: drive.
Input 1s and 0s as the 5 digit binary code until you get the right combination (it changes if you get a system faliure, described below) to have access to the following apps:

Play.exe: Get to play the FMVs in the game

View.exe: View the characters and their bios, cars, maps, guns.

Drop.exe: Use it to drop weapons in levels. You need to know the weapon and level code to do this. Use View.exe to view the map where it should appear.

Decode.exe: Use this to decode the codes given in the ''Real World'' aka the real pages, like enterthematrixgame.com, thematrix.com, etc

Virtual.exe: You'll engage in a sort of game where you have to complete a chinese (I guess) symbol, which represents a color. When you complete the symbol you'll get the color you got. TRY TO GET RED. If you get another color, or if you get a timer, use the app below to end it, if not, you'll have to start hacking into the B: drive all over again.

Tracekill.exe: Its pretty obvious what to do with this one. If you get unlucky and get the timer (which happened to me :p), type TRACEKILL to end it, if not you'll get a SYSTEM FAILURE message and a really annoying screeching sound from the speakers.

Enter Hacking mode, and unlock it all the way to the DIAL.EXE function. When you can place calls, dial 0019495550101. The Merovingian's lovely wife says, um ... hi. :)

Enter these passwords at the hacking screen:

Select Load Game from the main menu. Select the character icon that has the Training Construct unlocked and choose Sparks Training Construct from the Level Select screen. At the beginning of the Training Construct level, go through the first brown door on the left side of the screen. Go to the button icon on the left side of the wall and press the square button. The objective is to collect as many rings as you can in two and a half minutes.

Succesfully complete the hacking minigame to have sparks unlock the multiplayer sparring levels for you. Load the game you hacked on and scroll all the way over to the left in the level select screen to find the multiplayer levels.