.CH file extention and TIFF layers?

[TruffleShuffle]

I have a few CD's here which are only recognised by my Mac, windows just thinks they're blank.

They contain a couple of .TIFF images and and a whole load of .CH files. I have been told that the .CH's are basically layers for the .TIFF images and if you open the .TIFF's there are grey areas where i guess these go.

Looking up .CH's online it just says that they are old OS/2 configuration files which surely isnt right in this case.

Can anyone shed any light on how i can use these files properly?

 

[TruffleShuffle]

On the mac i only have the default image viewer, it opens the TIFFs but there are matt grey areas in the images where i guess these 'layers' are supposed to be.

I can put Photohop on there when i get back home from work. To be honest i thought i had it on there already, which is why i brough my mac laptop into work with me, but its not.