My BES service is acting up. the server needs some sort of patch that is not being done for fear of messing up the "tree?" whatever that means

How do I setup my blackberry for BIS on cingular? And disable BES...
here is what I figured so far:
1)go to cingular BIS site and register PIN and IMEI number.
2)BIS service books get pushed to Blackberry.
3)delete the CMME service books from blackberry from BES
4)??????
now I'm lost

Or is a better bet to erase the blackberry and start over. reinstall desktop manager and set it as a BIS device? How would I get the contacts and other data back to my blackberry? If I set the desktop manager as BIS would it know to import all the info from my outlook?
the final step I know would be to forward a copy of all exchange email to BIS address. It's the in between that I cannot figure out.
any help is appreciated.
thanks, Roger