I'm assuming Windows.

You have to install it for the "Default User".

Here are instructions for XP.

Create a bogus user. Log in as that user. Create the printers for that user. Log out. Log in as an administrator. Change your folder options to show hidden files and folders and not to hide protected OS files. Bring up the "System" control panel. Select the Advanced tab and click the User Profiles settings button. Select the bogus user and click "Copy To". Under "Copy Profile To" enter or browse to "c:\Documents and Settings\Default User". Click OK and back out of the control panel. Reset the folder options if you want. You probably want to delete the bogus user and his profile (same control panel page to delete profiles).

Now users that don't already have a profile on the computer will get the Default User profile when they log in for the first time. Existing users can have their profiles deleted and recreated when they log in next. Or you can just fix them manually.

You can set other default stuff this way, too.

Pain in the ass, huh?