Cubase SX2 midi files

Im totally up to date with lion and cubase 6 but I have a problem. I have some early cubase SX2 files I wish to use in cubase 6
Before it was easy done by using cubase 3 to upgrade the midi files but now this now longer possible with Lion.
Has any one got a work-around short of setting up PC on my mac and using say windows XP to load cubase 3 and upgrade the files that way which I think would be an expensive exercise,

Midi-files are cross platform and midi has been a standard for decades.
A midi file should open in everything that supports midi, including all versions of Cubase (including Cubase 6).

Sorry I ment Songs with synths and various effects