Bill gates won't let you load up any individual file
that's bigger than 1 MB, no matter
what your total allocation is. So you'll have to be
ruthless and trim off a bit more. Or...
...reduce the resolution (and thus the quality) when
you convert from .wav. If you're using thon Ejay MP3
station software then it uses a 128 Mbits/s
resolution by default, but if you change it to 64
(click on the wee cog wheel symbol at the top left
to get at the resolution settings) the resultant MP3
only takes up half as much room.
For Guireans tracks, on my stereo, I can't tell the
difference in quality. However,
given the Prog Rock Dark Side of the Moon type
fidelity of your average Dun Ringles opus you might
notice it a bit more.