using nlite 1.4 beta I was able to integrate all hotfixes and ie7 into these files:
06/01/2005 12:55 PM 573,765,632 en-home-oem-sp2.iso
05/23/2006 03:24 PM 606,691,328 en-home-rtl-sp2.iso
05/23/2006 03:20 PM 654,419,968 en-pro-oem-sp2.iso
05/23/2006 03:22 PM 656,840,704 en-pro-rtl-sp2.iso
07/03/2007 01:47 PM 609,835,008 en-pro-vlk-sp2.iso
Everything was successful, with no errors. Here are the results:
07/03/2007 08:02 PM 609,331,200 en-home-oem-070307 drivers.iso
07/03/2007 07:58 PM 590,092,288 en-home-oem-070307.iso
07/03/2007