I found this info posted somewhere outside B1. It's supposed to be a way to trick XP Corp SP1 activation... To me it looks
toooooo easy 
Comments ?
1. Perform a slipstream update to your Corp XP.
2.Use a new key (not the fckgw).
3.From the SP1 files found 2 named IPSELPID.DLL and IPSELDPC.DLL. Rename the first one to:PIDGEN.DLL and the second to DPCDLL.DLL.Now copy these two files into your I386 directory into a slipstreamed XP and overwrite the existing files.
4.Just burn the damn cd!
I've tried this with SP1 Build 1090 and it works fine!!!
NOTICE:Unhide hidden folders in order to view the above files
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