Is there an explanation of why Microsoft uses at least 3 different way's of naming an ISO, depending on from which branch it is sources? WZOR uses one way, not sure what that source is. Yeah yeah, I know Microsoft would like to know as well. Then Technet has their way, and their Volume division has another. ISO's are all the same. An example, (I know they are not 7) I have from all three is a Vista Business SP1 VOL. en_windows_vista_business_with_service_pack_1_x64_dvd_x14-56048.iso (Technet) SW_DVD5_Windows_Vista_Business_32BIT_English_32_Full_Int_MLF_X14-56028.ISO (Volume) 6001.18000.080118-1840_amd64fre_Business_en-us_VL-FRMBXVOL_EN_DVD.iso (???????) All 3 have same SHA1.