Thanks for the replies, I can build off of them easily.
I've asked a friend to make me a new 'subwrap.png' (currently the grass), so I'm hoping to receive that shortly. The registration I know seriously needs sorting out and needs more information to be input, and probably needs CAPTCHA to stop the occasional scam registration. Giving the background a more starry feel is a good idea, I'll definitely be taking that on board. I also had some new buttons made by the same person as the banner/bottom which are similar, but I was planning to add them with the grass replacement. And as for a content form I'll go make one now!
Thanks for the constructive criticism!
Dossy.