4015N & 4050N, how to get HP Universal PS driver with resolution higher than 300dpi?? [ Edited ]

[nikoc]

Hi,
I'm a system builder & network administrator, i have a lot of experience with little formal training.
Currently I'm doing maintenance of computers in a small firm. Firm is heavily relaying on printers, since their main business is desktop publishing and book printing. They are slowly migrating from Windows XP Professional 32bit to Windows Vista 32bit & 7 32bit. The firm has about 8 computers that use 4 networked printers. The printers that I'm having problems with installing are the new HP LaserJet 4015 and an older HP LaserJet 4050. The main driver for this kind of desktop publishing and book preparation is PostScript, it's an imperative to use it.

I'll now describe the situation and the problem with solutions that I've tried.

Windows XP Professional SP3 32bit computers.

HP LaserJet 4050N. When using the default driver shipped with the printer I manage to set the printer using all PostScript options. When using HP Universal PS driver (I've tried a couple of versions) all that I can get is printing for up to 300dpi resolution.
HP LaserJet 4015N. There is only an option to use a HP Universal PS driver (I've, also, tried a couple of versions) and all that I can get is printing for up to 300dpi resolution.

- This is a serious problem, since the firm is using usually PostScript with 600dpi or 1200dpi for printing preparation on transparent paper.
- Note> I've, also, tried this on Windows XP Professional SP2 32bit computer.

Windows Vista SP2 32bit computers.
HP LaserJet 4050N. There is no default driver shipped with CD nor a printer specific driver for Windows Vista systems. The story is the same as with Windows XP Professional SP3 and all HP Universal PS driver tries>

There is only an option to use HP Universal PS driver (I've, also, tried a couple of versions) and all that I can get is printing for up to 300dpi resolution.

Also, the default Vista driver cannot load - after installing the default driver shipped with Vista system whenever accessing preferences to setup the resolution I get the message "The driver is not installed, Do You want to install HP 4050 series PS driver" and starts install procedure that ends with no message, with entering to preferences with printing resolution up to 300dpi. Now, every time when I access the driver, again, to print something I get the same message and I need to install the driver again in order to print with a limit set to 300dpi.
HP LaserJet 4015N. Completely the same situation.

Printer install procedures that I've tried are:

- under WXP and WVista> both Windows procedures (Add printer and install as a Local printer with creating a new TCP/IP port; Add printer and install as a Network printer)
- under WXP> for HP LJ 4050 setup procedure from a CD. Also, for both printer, for HP Universal PS driver setup procedure.

- under WVista> for both printers setup procedure for HP Universal PS driver doesn't work, as a workaround I've installed the HP Universal PS driver using Windows procedure (Add printer and install as a Local printer with creating a new TCP/IP port)

I think that it's obvious that HP Universal PS driver won't allow me to use a higher resolution than 300dpi.

My main question is how to get both printers to work on both types of OSs with a possibility to print on resolutions higher than 300dpi??

- Why is this happening?
- Is there a workaround for this?

- Am I doing something wrong? Am I missing something? Should I be using some patch?

It would look unserious to me that HP Universal PS driver is not supporting higher printing resolutions?! Or am I wrong?

Note> The only computer I've haven't had any problems with is Windows XP Professional 64bit.

A shame that there isn't a better way to thank people than posting THANKS TO EVERYONE that reads this and gives me a usefull idea!!

With regards,
Niko