You probably either have this well sorted out by now, or you have shoved the HP5000 in the corner and given up on it as a lost case.
The other two answers you got helped you a little I guess, but they did not get you were you want to be.
I have worked given technical support for this...
Laser Plates
You will find that the plates you are using are not at all fussy about fount. As a general rule, any good quality fount that works with metal plates will work with these plates (Varn Universal Pink is a good starting point if you don’t already have one).
I am guessing that...