@ azizcha
To answer one of your Q's :
If you have a FCKGW installation of WinXP, and replace the key with a "generated"
one, you will *at this current time* be able to install SP1 beta, and to use Windows update.
How long this will work, is another Q
FYI : Using the fckgw or a generated key, is NOT approved by MS, or BetaONE.