Did you manage to change the keyboard theme on iphone 4? OS4.1?

I think the standard iphone keyboard is one of the ugliest things I've seen in the phone. There has been awesome keyboard themes along the lines of Macbook Pro / Black/white macbook etc

Anybody managed to do this successfully on your iphone 4 with latest os?

I've tried advice given here:
http://www.iphoneheat.com/2009/12/winterboard-keyboard-theme-iaccess-macbook-air/
but got a bunch of chinese characters and couldn't text properly, so panicked and unstalled iaccess stuff...