I have an old G4 Mac Laptop I want to start using again, no recovery CD and need to reset the username and password because I can't remember them

If you have installer disk handy,

Versions 10.9, 10.8, and 10.7
Boot into the Mac OS X boot loader menu by holding down the OPTION key at system start

• Choose the Recovery drive to boot into recovery mode and wait until the "Utilities" screen appears
• Pull down the "Utilities" menu and choose "Terminal"
• At the command line, type "resetpassword" without the quotes
• Confirm the new account password, then reboot the Mac as usual

Versions 10.6 and 10.5

• Insert the bootable DVD into the Mac and restart or start the computer
• Boot the disk by holding down the "C" key at system start
• Select your language preferences and then under the "Utilities" menu select "Password Reset" (it may say "Reset Password" instead, depends on theversion of Mac OS X)
• Select the hard disk that the forgotten password is on, then select the username of the forgotten password, you'll then be asked to select a new password
• Reboot as usual from the hard drive, using your newly reset password as the login!

Your best option is to use a Mac OS X install disk. Insert the disk, hold the 'C' key to startup from the CD drive, and there should be an option to reset your Administrator password. The details will depend on the version of OS X.

SmartKey Windows Password Recovery can reset any Windows password including Domain Administrator (Active Directory) or other user passwords, It also can change passwords and create a new Administrator user account.

Forgot your Windows password? Wanna create a new Administrator account or change Windows password? That's it! With this effective Windows Password Recovery software, you can enjoy quick access to your locked computer. No need to call a technician, no need to re-install anything, and you certainly don't need to reformat. Pretty easy, try it!

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Use the Operating System install disk that came with your computer to reset the password. You can boot from the disk by holding down the Option key while starting up your computer with the disk in the cd drive.

It's very easy and useful to reset local administrator and user passwords on Windows Vista system.

Get started with the download - 3 simple steps:
Step 1 - Download
Step 2 -Burn your Windows Password Recovery Tool 3.0 CD:
To burn your CD, you'll need a blank CD-R and the .ISO file of Windows Password Recovery.
Step 3 - Put in your newly created CD and remove Windows password.
It also supports usb drive.
Hope it helps.

Resetting the original administrator account password Follow these steps to reset a password when there is only one administrator account on the computer, or if the original administrator account needs a password reset. "Original" administrator account refers to the one that was created immediately after installing Mac OS X. If the original administrator password is known, that administrator account may be used to reset the passwords of other administrator accounts using the steps described above. These steps require an optical drive; if your Mac does not have an optical drive and you have a Mac OS X v10.6 Install disc, see below.

1. Start up from a Mac OS X Install disc (one whose version is closest to the version of Mac OS X installed). Usually, you can start from the disc by putting it in your computer, restarting, and holding the C key. Or, put it in the computer and click the Install or Restore icon you see in the disc's main window (after which the computer will start from the disc without you needing to hold C). Or, you can use Startup Manager or the Startup Disk preference pane to select the Install disc.
   
2. Choose a language, click the arrow button to continue,
3. Mac OS X v10.6 or later: Choose Password Reset from the Utilities menu.
   Mac OS X v10.5 or v10.4: Choose Reset Password from the Utilities menu.
   Mac OS X v10.3: Choose Reset Password from the Installer menu.
   
   Tip: If you don't see this menu or menu choice, you're probably not started from the disc yet.
   
   Note: The default keyboard layout is U.S. English while started from the installation disc. If you use a keyboard layout other than U.S English, use the Input menu (the flag icon on the right side of the menu bar) to select the desired layout before typing a new password.
   
4. Select your Mac OS X hard disk volume.
5. Select the user name of your original administrator account.
   
   Important: Do not select "System Administrator (root)". This is actually the root user. You should not confuse it with a normal administrator account.
   

Insert your Mac OS disc, restart with the disc as the startup disc, then go to the menu at the top of the screen (instead of launching INSTALL), you'll find a password reset in the menu...

when you are creating it do you do password recovery? if yes you can insert the storage device you use to store it.

Try using no password by leaving it blank. If that does not work then boot from your OSX install disk and reset the password from the menubar.

you might want to check the www.belkin.com site to see if that can support Mac Powerbook.