Ok i'm feeling kind of stupid, because all the time i had polaris office installed, which reads all my excel files. The only problem it has is that of course it cannot handle custom macros and functions in excel. So my fantastic roller sheet does not really work in it's latest version. But my old version which only uses standard excel functions works fine. So now i'm going to have to downgrade to not use my macros, but that's a manageable sacrifice to make.
Still I'm not quite there, but soon.
I think though, that i'm just going to share a dropbox folder for the maps instead of posting links this time.