[Printing-user-general] Problem with GimpPrint on HP DesignJet 430 on MacOS X 10.4.5

I've installed the HPIJS and Gimp-Print drivers on my Powerbook, and  
setup the HP DesignJet 430 which is connected to a Win2K box across  
my office LAN. It works fine, except...

When I have a large drawing (we are using Graphisoft's ArchiCAD 9 and  
PlotMaker 9 for MacOS X and Win), longer than 96.1 cm (just over 36  
in), well, the plotter will cut the paper off when it's spewed out  
those 96.1 cm of it - no more and that's it.

Any ideas?

BTW, I tried to Print to PDF instead of actually printing on the  
plotter, and when I opened it in Preview it showed OK, and the Info  
box displayed the proper paper size, 60.96cm x 100.00cm. Only when I  
tried to print *that*, it came out as a miniature of its real size,  
sitting comfortably in the middle of my large piece of white paper. !...

As always, many thanks people.

(PowerBook G4 17 1.67GHz   Mac OS X (10.4.5)   TiBook Gigabit  
Ethernet, B/W G3, Win2K, WinXP)