changing look of multisite

Hi there
still having layout problems. I have a multisite website and have buddypress installed as it sets out the blogs page and registration page.

The best example of how i want my registration page and blogs page to look like is in the website Edublogs which is built on the wordpress format and probably squidoo or hubpages.

I dont want to have buddypress but seem to have no choice as it sets out the layout for the blogs page. Buddypress also conflicts with nearly all multsite plugins. I just want to be able to change the layout.