Microsoft has released Windows Vista Service Pack 1 RC1 - All Language Standalone Package
>> Download for 32-bit
>> Download for 64-bit
Windows Vista Service Pack 1 (SP1) RC1 should be used to update a PC running Windows Vista RTM to Windows Vista SP1. This standalone package will install SP1 as well as any applicable pre-requisite packages.
The All-Language standalone package supports installations on all versions of Windows Vista with one or a combination of the 36 Windows Vista languages installed.
>> Download for 32-bit
>> Download for 64-bit