Windows Server 2003 R2 beta installation guide Enterprise Edition CD1 : ARMEFPP_EN Enterprise x64 Edition CD1 : ARMEXFPP_EN CD2 : beta, rc.. because Windows Server 2003 R2 Enterprise RC0 disc 1 (TechNet Beta Evaluation 2005-11 - 0366.00) is armefpp_en.
Code: Windows Server 2003 R2 Standard Edition with Service Pack 2 English OEM CRC32: FFFFFFFF MD5: 06C62B07562FA11B39F9AD858672640F SHA-1: C21295AD34725054B5A7B3825ABDDA79AC452376 thx @marvias