Thank you for all your helpful comments.
Banjaxed, if I'd seen that wacom bamboo before I bought the e-pen I definitely would've gone for that instead.
The e-pen does what it says on the tin 'looks and feels like a real pen'. And its fine if you want to take notes. But - and its a big but - the pressure sensitivity is not great. I'm using artrage at the moment as recommended and you can change the loading volume of the paint. It still doesn't compensate for the lack of sensitivity of the pen, however. It's fine for dabbling but I've found it very difficult to complete some of the finer details of my paintings. I can't seem to make them look finished. I have a trial version of Photoshop CS4 and it seems really good. I have Photoshop elements but it is so geared towards photo editing that I can't seem to make a go of it.
I think Ill look at buying CS2 (cant afford CS3) and the Wacom bamboo tablet. It's very trial and error at the moment, I know what I want to do but I just need to find the right tools I suppose and learn how to use them properly.
There are many Photoshop courses in my area (Southeast Ireland) but they are all photo-editing ones. Just a bit stuck at present and frustrated that I can't get my teeth into a painting!
Thanks again guys, my little rant is over now :)