No, I don't own this acer. Yes, I do backup my system prior to changes I think might be a problem.
I want to install SP3 before Microsoft pulls the plug on XP in 764 days.
Has anyone done this?
I am up to date with automatic updates, even IE8, except for SP3.
I have read so many horror stories (none about the Ferrari 3000) and warnings about AMD CPUs (which of course powers my Ferrari) and driver issues (WLAN in particular) on the Net that I am proceeding cautiously.
Any experiences, positive or negative would be appreciated.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic