I had that too - just do as PentaxDan says and it will work!

How do you have the colour settings in PSE5? And do you have sRGB or Adobe RGB set as standard. These can affect the printer output.
I have looked at the handbook for your printer and can see no reason why you would need the plug in, even with full Photoshop. Chapter 3 in the handbook clearly explains how to set things up in PSE for your printer.

Hello Gordon. Welcome to the forum. Quiet is fine, I hope you learn a lot and will contribute more often as you feel more confident!

I now have a Dell 1908WFP. It's bigger brother (2408WFP) came out best in a test of reasonably price monitors in one of the UK computer magazines. I don't have room for such a huge screen so opted for the 19 inch instead. It is a vast improvement over my tiny, old, HP monitor.
I would have liked to compare it to a more expensive make, such as Eizo, but of course since Dell don't have shops that was impossible.
Nevertheless I am very happy with it, and can put the difference in price between it and an Eizo towards the 60-250.

Welcome Steve - always room for one more here.

In what way are the results average? I use an HP printer (a C5280) and PSE6 and have no problems with my prints. Previously I used PSE4 with no problems.
Maybe it is your screen rather than either PSE or your printer. Is it calibrated? What inks are you using? What paper?
I would pursue all other possibilities before blaming PSE and forking out on full Photoshop. PSE does nearly everything you need for photo work

Welcome Martin!
Could you add your location to your profile please, that way we know where you are in the future too.

Thankyou!

Clarky I believe if you use the focus adjustment on a Pentax lens the camera will recognise the lens and adjust accordingly. Of course it will apply the same adjustment to any Pentax lens of the same type, as it can't read the serial number.
I'm not sure it works for third party lenses. It'll be in the handbook somewhere, but i don't have that handy.