First off, John D. you are thief, 500$ for an IT install disc is bull when you can just download them or call the companies for a copy. There is no IT version of an installation disc, only volume licensing, and you still cannot use someone elses volume product keys unless you know their domain name and company name and support contact, along with the product key, and the build number and exact specs on the systems they are deploying their copy of the disc on. Installation discs are nothing without product keys, unless you have a cracked copy of one, or access to a third party program that will void out the activation client (oobe.exe).
There are 3 real ways to bypass any stuck passwords on any XP computer.
1. Use the build in machine administrator, if it's unlocked. Seeing that administrator's can change the passwords of administrators, access to any local administrative account will yield an entry to the user account control panel applet. To see if your built in admin account is unlocked, you will need to start the computer normally. When it finishes loading, you will have one of two screens: The welcome screen, or the Windows Logon screen. If you have a welcome screen (Windows XP Home default) you will need to press CTRL ALT DEL simultaneously, and then again. CTRL+ALT+DEL release, CTRL+ALT+DEL release. The welcome screen should change to the advanced login screen, that you may already have if you have turned off the welcome screen, or if you are using XP pro, or Windows Server 2003. Next, for username type in Administrator, leave the password blank. If you can get in with this account, or any administrator account, click on start and click run. Type "Control UserPasswords2". From here, adjust the passwords of each account on the computer as you see fit.
2. Next, let's say you can't get into any administrative account, or perhaps windows is not loading all the way because your product key has expired. You will NOT be able to access command prompt in safe mode to change administrative accounts unless you can actually logon to the computer, so if windows is locked because of product key issues, don't try this. But if you can still get into a user account that is not an admin, and you need to unlock an admin, the login as the normal user and create a new account using command prompt (as a limited user you cannot do this via the control panel) and type
net user Admin2 password1 /create
this creates an account named Admin2 with a password of password1.
next see if you can make this account an admin. type
net localgroup Administrators Admin2 /add
if you get an access denied message, you will need to go to step 3. If you get a command completed successfully, the log out and go to the normal login screen. Then log in as Admin2 with the new account, and you now have admin control of the pc. Go to step 1.
3. If you cannot get into windows as any account or using command prompt in safe mode or if windows is locked with a bad product key, you can use third party software to adjust the Admin Password, or to adjust the microsoft oobe activation client, so that you can regain access. My suggestions would be to use linux boot disc, (which you can put on a CD, floppy, or flash drive) and as long as BIOS is configured to accept a boot order with one of these devices before the harddrive, then you are good to go. If not, you will have to go into BIOS to change it. Type F1 or F2 at startup to gain access to BIOS. If there is a BIOS password, and you don't know it, you will have to reset BIOS using the reset jumper on the inside of the motherboard. Look that up on google for more information.
4. If all else fails, and you cannot get in, you will have to settle for reformatting. This will clear all user data and files previously on the computer though, so save whatever you can before hand. Then, on another computer, download a copy of an installation disc for Torrentz or piratebay and burn the ISO to a disc using IMGBurn or nero, or any of those other hokey ISO burning programs. Then, place the disc in the computer you want to reformat. When it says "Press any key to boot from disc" (during the normal boot) press a key, and wait for the OS to load the WINDOWS Setup Menu. Follow the onscreen instructions to reformat the harddrive and reinstall windows. If it asks you for the current admin password you are doing something wrong. Make sure you are not trying to repair windows, or install windows onto the already made partition. This will ask for a password. You need to press D to delete the partition. Delete all partions on the drive. L to confirm the delete. Then once your disc is empty, press enter to reinstall windows and reformat, etc. Follow the directions on the screen. If you are using a cracked version of Windows, you will not need a product key. If you are using a normal disc, and you have a product key that works (usually on the side of the OEM machine, or on a label on the software package for ordered products) then type that in if it asks for it during setup, or after setup on the first logon when MSOobe (the activator) starts.
Any questions, or if you'd like me to outline specific instructions for you in a specific scenario, e-mail me privately at zgwin (at) zigweb (dot) net.