Think he may have meant the degraded performance when using OS 4.1 on a 7290... most people have reported it 'feels' slower. I agree about OS 4.2 not being supported on 'legacy' handhelds (non-Intel handhelds; 7290, 7100), although it may - who knows. it's not absurdly large so that it wouldn't fit on there - about the same size (although 2x the files almost) as OS 4.1 (when installed, that is).