You are quite right about the need to upgrade the versiuon you have. At TWR computing we have v8.5a which will work fine on XP or Vista. See our website for details or contact me offline for ordering information, firstname.lastname@example.org
A memory stick is s good way of transfering all your files from one PC to another. If you dont have a USB port on your old machine you could always do it by disc or even email if both PCs are connected to the internet.