Manually removing the SMS client from Windows XP

I have a machine that I must remove the sms client from. The first thing I tried was ccmclean.exe, which ran without error, but nothing was removed. I then queried Microsoft on how to do it manually, they gave two options, first was ccmclean, the other was using a command line of "msiexec /x \\server\SMSclient\i386\client.msi" This produced an error:

"The installation source for this for this product is unavailable. Verify that the source exists and that you can access it"

I then copied the folder from the server (which I have full access to) to the local machine and tried again, it gave the same error. I tried a third option that I found on the internet, that was "msiexec /x {uninstall guid}. I recieved the following error for that:

"The installation package could not be opened. Verify that the package exists and that you have access to it, or contact the application vendor to verify that there is a valid windows installer package."

At this point I am stuck, I cannot rebuild this machine and I cannot keep the sms (this is a master image machine) If anyone knows which files to delete and which keys to delete to remove this without ccmclean or msiexec, you would be a lifesaver.