Hello, I hope you guys can offer some advice. I have been using Visual CADD for my once-every-couple-of-years home construction projects, but the version I have is not compatible with Windows XP which I just switched to. And I have a garden barn project ... Rather than pay another 5 or so for an upgrade to this obsolete program I decided to check eBay for available copies of AutoCad LT. It looks like they will cost me more, but at least then I will have a mainstream program. 1) Is Autocad LT 2002 the earliest (i.e., cheapest) version that will run on XP? 2) How does this registration business work? I obviously don't want to buy pirated software but people that appear to be selling legit software are careful to say whether it has been registered or not. Does this mean there is an issue with transferring registration or ??? The Autodesk website is not helpful on this topic. 3) Is there a better choice of programs? My drawing is limited to home remodeling projects like kitchen layouts, yard barns, etc. TIA, Mitty.