So I got Vista RC1 and my beautiful MacBook was begging for an update [H]

BUT:
1st, I already had Beta 2 installed, and in order to get this done you need to delete the 200MB EFI partition.
2nd, there was a BootCamp update, which wont start if the EFI partition is missing

SO:
How the heck do I get back that partition?

After some googling around I found a couple of instructions:

Note: Doing this is very dangerous. I strongly suggest to backup all your data!

• Start Vista (from CD or from the Mac) and format the 200MB partition as FAT32 file system using Computer Management snap-in
• Reboot your Mac and hold Command-S. Now you are in "Single User" mode - feels like a completely different world here [:D]
• Type "fdisk /dev/rdisk0". The Mac partition (2) should start at 409640. Note: if this isn't the case, don't continue!
• Considering the previous command showed the expected output, type "edit 1"
• Answer "EE" to the prompt for System ID, "n" when prompted about editing in CMS mode, "1" for the start block and "409639" for the length
• Verify your settings with "print" and commit with "write" - you can cancel the procedure with "exit"
• Reboot and start the BootCamp assistant

This worked for me and I am using an Intel MacBook. And, almost forgot, when using RC1 you do not need to delete the EFI partition anymore!

This took me a while so I want to share some of my findings. My situation may be a common one so here's the task I want to accomplish:
I use Exchange 2007 Beta 2 as a "single server" setup - which means all relevant roles are installed on one physical server to send mails, receive mails, connect via Outlook and Outlook Web Access, etc. You can read this post which tells you how to do that.

Now I want to enable relaying without any authentication but only from some of my internal IP addresses.

This is what I did (there may be another way to do this):

• Organization Configuration / Hub Transport / Accepted Domains
  Create a new entry. Select "*" as accepted domain and select "External Relay Domain"
• Server Configuration / Hub Transport / Receive Connectors
  Create a new custom receive connector and specify the IP range of your allowed internal servers in the list "Receive mail from remote servers which have these IP addresses:"
• Now fire up the Exchange Management Shell
  execute: Set-ReceiveConnector -Identity "[type your receive connector name here]" -PermissionGroups "AnonymousUsers"

The last commands enables you to relay messages from this IP range without authentication.

Edit:
As Rodney Buike pointed out there is a more elegant way to do this: http://msexchangeteam.com/archive/2006/12/28/432013.aspx

Thanks for the feedback...