well it wouldnt be that hard to accomplilsh
just export from winme the reg keys you want, then edit that reg file and copy the contents to a .txt file or what not
then boot to win2k and either manually add the keys and strings or export a random reg entry and edit it with the info on the ext file
makes sense, no?
[edit] i dont suggest you try to simply copy/paste things this way though as a way to get around reinstalling. when you install programs, often files are coppied to system folders and such and it would be very difficult to copy every file and reg entry. [/edit]