There are two ways to access the cheat menu. 
 The slow one, and the fast one 
 
 Here is the fast way:
 
 Step 1
 Start a new gamefile with the username "TooManySecrets"
 
 Step 2
 Create a password for this username, such as "TooManySecrets"
 
 Step 3
 Enter the game, and press "F1" at any screen. A cheat menu 
 will appear, giving you a list of cheats
 
 And here is the slow way:
 Step 1
 Open up all the servers in the game.(on your world map, and 
 your server list, making them visible).
 
 Step 2
 Get access to all the government servers (Stock Market, GCD, 
 Academic, Social Security, Criminal Database) and get admin 
 access. Then get admin access on the Protovision game server. 
 Now connect to the credits machine, and back to the Uplink 
 Internal Services. There should be a new item called
 
 "Cheats", in the "Software" upgrades menu.
 
 Step 3
 and last but not least, you buy it as if it were a normal piece of
 equipment
 (software). It costs 0g, and goes in your program list under other.
 
 Well this is the 1st way I got the cheats with. 
 Of course you "COULD" use the fast "TooManySecrets" way, 
 but what is the fun in that. This method takes about 30 - 60 
 min, if your fast, and it involves alotta fast thinkin, weather 
 or not to delete the logs, or just logout and hope not to get caught.