Yes of course.
I'm not entirely sure about the mechanics, I must admit. I went for the easier sounding option of downloading a module rather than having to edit a file. I went for both download options and installed them both. I installed CK last and it seems that instead of selecting one after installing, the last one you installed is default... well that's what I found anyway. CK was up and it did exactly what I needed. I can't find a manual to help me further with customisation, but it's sorted enough to mean I can go and look at the other 'must do before publishing' things such as forum font size.
Thanks agan

I have just found that the basic editor doesn't have an 'add image' option. Does anyone know how to tweak the menus a bit, or know of a manual for CK Editor? I couldn't find any doc for it.

Ah, I was on the wrong site, thanks again. Will post a solution when I get a chance to read up.