You can copy the winplan folder from the XP machine to the Vista machine either through the network or CD. I haven't used my floppies in years, just keep a backup on CD. Once done you need to get all the DLLs. This link here says they have them but when dealing with system files you want to scan them with AV software or copy them from the XP machine individually.
Not sure if you put them in the system folder or system 32 but I'm sure you can figure it out. If not I can look later (at work now) or somebody can verify and post.
Side note: WINPLAN crashes in Vista about once an hour for me with a memory error. You can either suffer through this or run it in XP in a virtual machine.
Hope that helps.