No, you need SP1 installed to install SP2 on Vista. Other notable changes you won't get any other way: # SP2 integrates the Windows Vista Feature Pack for Wireless, which contains support for Bluetooth v2.1 and Windows Connect Now (WCN) Wi-Fi Configuration. Bluetooth v2.1 is the most recent specification for Bluetooth wireless technology. # SP2 improves performance for Wi-Fi connections after resuming from sleep mode. # SP2 includes ability to record data to Blu-Ray Disc media. # SP2 also includes a Service Pack Clean-up tool (Compcln.exe) which helps recover the hard disk space by permanently deleting previous versions of files (RTM and SP1) that are being serviced by SP2. The Service Pack Clean up tool can also be run offline while creating slipstream images to reduce the size of the image.