MDI files?

[the Western zoo]

I need to open some MDI flies - which I made while I was using PC... They are pretty much the same as PDF files just made using som office program... I have office for mac but I do not seem to have any app that will open the MDI files... can anyone help?

 

[the Western zoo]

noone knows any apps that'll thouch these files?

I've found out that it's short for Microsoft Document Image but I can't find anything that'll open them, and I really need to open them cause It's some old invoices I need to print...