WIN XP SERVICE PACK 2 OS Integration

hi,

I have a bootable win xp pro cd with sp1 in it.
I have got win xp sp1a & win xp sp2 from
various free CD\DVD's.

Is there any way I could integrate them to my
existing OS installation and burn it to another CD
so that when i install WIN XP Pro again sp1,sp1a,sp2
gets installed by default.

I heard someone say that it could be done

Please HELP..

Greetings Bye.