customize my multisite wp-signup

Hi,
I want to customize my wp-signup.
i want to have a one page sign-up. for this i used:
1. Remove Email Verification From Signup &
2. Set Password on WordPress Multisite Blog Creation

This is giving me almost what i need.
now i want to simplify the signup even more.

i want to skip the second form and use the the user name as the path of the users blog, and to use a blank blog title.

i want to click only once on the next button, and to get the "Congratulations! Your new blog is ready!" right away.

i want to skip from screenshot,png to screenshot-2.png, without the screenshot-1.png

how can i make this happen?
Cheers,
asaf.