The summary of the various iso's tried sofar 512.325.632 bytes usa_2600__x86eval.pro_whistler.iso CRC 0x7EA18B64 Validated ABF Test-post *512.325.632 bytes usa_2600__x86fre.pro_whistler.iso CRC 0x6B46327A Validated Edonkey *512.342.016 bytes usa_2600_x86._corp_ed[KB ISO].iso CRC 0x6E8390C0 Validated Edonkey *512.342.016 bytes usa_2600__x86.pro_no_activation.iso CRC 0x6E8390C0 Validated ABCDI Vexorg *516.198.400 bytes usa_2600__x86cs.whistler.iso CRC 0xDD70A31C Validated ABI Thadus *522.549.248 bytes XP_RTM_OEM_USA_PRO.iso CRC 0x5A93E36D Validated Edonkey *522.549.248 bytes usa_2600__x86fre.pro_whistler.dell.iso CRC 0x5A93E36D Not validated? IRC NewOrder 516.530.560 bytes usa_2600.1rtm_x86fre.pro_whistler.iso CRC 0x8EDA7CD6 Validated Edonkey 519.927.808 bytes xp2600Autopatch.iso CRC 0xB8E2B316 Not validated ABWIPMB Baldy Checked with CRC.exe from the link in this forum usa_2600__x86fre.pro_whistler.iso Tested as Corp.ok myself usa_2600__x86.pro_no_activation.iso Confirmed good usa_2600_x86._corp_ed[KB ISO].iso Same as above, differnt key usa_2600.1rtm_x86fre.pro_whistler.iso Korean (RC2?) usa_2600__x86cs.whistler.iso Accepts Corp. key and upgrade (still testing) usa_2600_x86._corp_ed[KB ISO].iso Tested ok.Bit bare usa_2600__x86fre.pro_whistler.dell.iso Reported good with OEM key Looks like there are 4 "corp" versions, of which 1 did not validat right with me All 3 no-Dell versions show "640" in the system applet and look to be the same, apart from the different serial in the [KB ISO]. Dolph