[weedahoe]

If you go to Active Sync in your Programs and then go to Menu -> Options -> Settings, there is an option that says "if there is a conflict:"

and then there is a drop down where you can choose the option to "Keep the item on my device"

But keep in mind, the system requirements for AS 4.5 do not say anything about Vista. This is why some people have issues with it working on Vista (although some people do get it to work). So good luck.