Thanks for the plugins, but I haven't been able to get them to work, I get error messages when I select 'pref > add plugin' in modeller. I'm not sure that's what I'm supposed to do, I've never used plugins before.
Instead I've installed Blender, and have successfully imported the *lwo. I now have an option of what to export to, the likely looking ones being:
3D Studio *3ds
Wavefront *obj