No service pack: EN_WIN_SRV_2003_R2_STANDARD_X64_VL_CD1.ISO EN_WIN_SRV_2003_R2_STANDARD_X64_VL_CD2.ISO Service Pack 2 slipstreamed: EN_WIN_SRV_2003_R2_STANDARD_X64_WITH_SP2_VL_CD1_X13-47808.ISO EN_WIN_SRV_2003_R2_STANDARD_X64_WITH_SP2_VL_CD2_X13-68587.ISO Both of these are 2003 R2 STD x64 VL but one has SP2 integrated. As a general question on this OS as well as others, typically, will a VLK that works on one work on the other? More specifically, if the only difference between the two media is the service pack, should a single VLK work on both?