Chilongola

I am new here!! I need some help. I am in the process of updating my unattended CD. I have created a SVCPACK.INF file. However in the instruction it did not say if this will work for Win XP Ser Pack 3. They already have a SVCPACK.IN_ file. This in the instruction is to be removed/replaced by the new file. When I expand the original one I see a whole lot of KB....... files in it. Does SP3 need this original for proper installation? Cheers to all