@ Spidey:

MakeCD supports MP3s directly, if the mpega.lib
is installed (with MOS 1.3 it is).

So, click 'New' (for a new track), then below
'source' click as long as 'Image-file' appears and
then select the MP3-file. So You can burn MP3->CDDA
on the fly (mostly 12x speed with G3-600) or make
an CD-Image first.

Regards