According to Microsoft, though, you can't - they're not compatible with each other, even if you install different versions.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]

thanks for your advice.
I really still have no real understanding of my problems.
I think my way forward wil be to ignore office 2013.
As soon as I can find another office 2010, Iwill be installing this on both machines.
My addins are more important to me, than how pretty a newer version looks.
regards..