Password to the Guest account

The default for the guest password in XP Home and Pro is BLANK...there is no password. I have been told by many even MicorSoft Reps that applying a password is not an option. Well they are all wrong. Listed below is the how to info.
To apply a Password to the guest account:
Please log on to this computer with an Administrator account and turn
on the guest account.
Click Start->Run->Type cmd and click OK.
Input the following command and press Enter. Net user guest password
Go to Control Panel->User Accounts. Click the Guest account and now you can change the password.
Thats it...it does work for I have done it many times.