An iprint installation of an HP Laserjet 5m fails with error code 1223
(unknown error). Using setupapi.log, I traced the problem to three files:

hplj4.gpd
ttfsub.gpd
stdnames.gpd

The installation works correctly, if the computer already had a Laserjet4
previously installed. If not, the above files don't exist yet on the
workstation, and the setupapi.log reports errors attempting to find the
files. A manual copy of the files to the c:\windows\system32
\spool\drivers\w32x86 directory fixes the problem. But it would be
helpful if iprint could be fixed to address the issue.

Thanks
Mike