[TYPO3] TYPO3 4.0

[rocky Ou]

Hey Group,

Our team are doing a website. The team members are not in an office. To 
make it convenient for all of us contibute to it in parallel way we 
installed the typo3 on the beta folder and work on it. This means when 
the site is ready to launch we need to do most of the configure  again.
A glance at TYPO3 4.0's release note, it seems it will be a huge release 
for this kind of situation. Because we can have multiple workspaces.

Right now we have a website alive and want to come up with a new version 
using typo3. I do not want to shut down the current version while we are 
doing the new version. is the current version going to be thrown into 
the back stage after install typo3 4.0 under main directory? If so, How 
can I avoid it please?

Secondly, Most of our work has been done under typo3 3.8.1. Can any of 
you give me an idea how to back the work up so that I can upgrade typo3 
to version 4.0 please?

Thanks a lot in advance!

Rocky