Novell iPrint Client for Windows
Uploading the HP Universal Print Driver version 5.4 to the NetWare Broker or Linux Driver Store results in "iPrint zip/unzip -15 - Unknown error".
After clicking the "Add From File" button and presented with a list of .inf files to select, do not highlight the first .inf (hpbuio351.inf), but select the second .inf (hpcu118.inf). Selecting the second .inf in the list will avoid the error and successfully upload the print driver.
As for Windows 7, it doesn't matter which INF is selected during upload. All INFs selections end up uploading the same print driver. That *should* also be the case with the Windows XP scenario, but an error is returned when selecting the first INF option.