Digital BW, The Print

I know there are a number of thumbnail viewer programs out there.
I've downloaded breeze browser for evaluation and it's fine but 
doens't view PSD files which is my habit.

Same appears to be true of ThumbsPlus.

Did I miss something?
I could see saving files as Tiff's without compression - don't know 
the consequences or difference from saving as PSD other than a viewer 
program could generate a preview.

Thanks,
Cleavis