For what it's worth, I've since found a program that suits my needs better. The program I mentioned in a previous post, requires the .NET framework to install and run. Fine if you've gor it already, but if not it's something like another 45Mb for the framework. Given that the program was only 3 or 4 it seemed like a waste.

Today I came across a program called Pixia. It and it's helpfiles come out to under 5MB!! Although a little interesting to get the hang of, it seems to suit me fine.

Something else worthy of mention is the fact that Pixia appears to support Photoshop filters!! Also provided is an SDK for the home-brew development of your own filters.
You can download and find out more about it here.

Simon.