I understand. However, I think they'd be somewhat justified in replying "you're trying to do something non-standard and unsupported". The large font support in Windows causes problems in a WIDE swath of applications. MC actually handles it quite well. Combining large fonts with a very low screen resolution (and probably small monitor) is just asking for trouble.
Fair point. I'm never sure if these accessibility features should be controlled better by the OS, or down to the program developers to make sure there dialog boxes do not misbehave. She currently uses a 19" CRT (a very good monitor in its day), but running at 1280x1024 is not something she can handle. She suffers from macular degeneration which means there are spots in her vision. I think if she could have her own way, the fonts would be around the size of the top line of an optical exam board!!
In XP you had the option of applying different themes AND adjust system font size. This is not possible in Vista (and I assume the same is true in Windows 7) where you only have the choice to increase system font size. This is the recommended course of action to increase font size by MS.
Of course, as monitor sizes increase, so do the resolutions, hence the actual font sizes remain the same or even decrease on smaller sized monitor with high resolutions. Hence the reason for looking at a 27" screen with a 1920x1080 resolution. Hopefully the large size of the screen with a resolution more commonly found on 22-24" screens, couple with a large system font, should do the trick.
This is only one of my headaches as my mother is looking to go fully digital for her dance classes. Essentially, I want a second mobile PC that she will sync with her main PC to maintain the same catalogue etc. The mobile PC can then be used to play music when she is running her dance classes instead of her carrying CD's and a portable CD Player. I was thinking about using the theatre mode on the mobile unit but set it in such a way that there is only a few bits of info on the screen (not sure how configurable the Theatre mode would be to use it in this fashion). The other option is to get a simple remote where she effectively learns where the buttons are - however the J River remote is not ideal as it is only IR - she would prefer an RF unit that can be used from any part of a hall and where she might be out of line of sight of the IR receiver.