thanks for the reply.
I already have the hp455 ppd installed in OS9 (sys folder, prefs printr prefs parsed PPD folder & extentions) on the machine with OS X . I can see the plotter in the print center but can't select it maually because no ppd is in the list provided. I tried to drag the the ppd's to the OS X system but do not know where to put them. This is what HP said in some emails:
Kurt,Thank you for contacting Hewlett-Packard's Customer Care Technical Center.As long as all of the Macs on the Network are booted in native OS 9.x, thenyou may do as you're requesting. ANY Mac running OS X natively will not beable to interact with the RIP software.
Kurt,Thank you for contacting Hewlett-Packard's Customer Care Technical Center.Actually, it won't work with OS X native at all. Classic mode, OS 9.1 only.
I will try the 1055cm ppd and see what happens.
Kurt