Hal,
>> I'm currently using the 604x for images and am happy with it except for the
>> fact that the mscdex file to load the driver takes up to 130 kb and I don't
>> have enough high memory left to load the driver high and therefore must
>> load it in conventional ram, thereby making impossible booting up several
>> programs.
Try adding the /E parameter to the autoexec.bat statement which loads MSCDEX.
This should reduce your low memory usage significantly.
Regards, Mark