I have a Mitsumi 4804TE also, copies everything prefect

Read the cd in your Mitsumi to your HD at 4x for copy protected cds, although I have heard that 16x speed read will work also, but haven't tried it myself.

And then burn at 4x and you have a prefect backup.

And get Clony for the correct settings for CloneCD.

I use memorex CDRs 80 mins 16x