Hmmm, do you really need your specs to be as low as 400 Mhz? The min specs of a pc you buy nowadays are 1.5 Ghz. I'm not suggesting you cut out a section of your market running old computers, but surely a higher spec CPU wouldn't dent that too much? Say 700-800 odd?
Sorry if those specs you posted weren't your minimum :o)
Sorry if those specs you posted weren't your minimum :o)