Windows Vista Service Pack 1 latest build 6001.16633 limited pre-beta release was available for download in .EXE standalone executable format. Microsoft does not provide any guide on how users can apply SP1 update to offline extracted Windows Vista DVD setup files, or slipstream SP1 into Vista RTM DVD ISO image so that the subsequently installed Vista will directly have the service pack. In fact, the slipstream option is not officially supported for stand-alone version of SP1 in this pre-beta executable, and Microsoft will only release slipstream version of Vista SP1 retail media or Volume Licensing DVD after SP1 goes live.
However, a method of repacking an install.wim to make a Vista SP1 integrated media image is possible by using WinBeta SP1 Reverse Integration Guide. The disadvantage of reverse integration method is that it requires a complete install of Vista RTM in order to integrate the service pack. For those who intends to slipstream Vista SP1, this may be the only way to do it as Microsoft does not provide any switches in the .exe executable to allow for simple integration, and Windows Automated Installation Kit (WAIK) are not designed for SP1, which a single executable spinstall.exe consists of 5 CAB files with windows6.0-kb936330-X86.cab been main CAB file, nor vLite integration will work.