Question on Exchange Install

I have a question on an exchange install. This is the first time I do this and I am looking for a best practice kind of tip. I have just upgraded to Windows Server 2003 Enterprise from a Win SBS 2003. I had to do this because I bought a fast new budget server that has a quad Core processor and SBS did not like this for some reason. Since I found out that the 3 times more expensive Enterprise version that not even come with Exchange as the SBS does, I did go out and coughed up another Grand to buy Exchange 2007 to install. Turns out that exchange does not want to run on my new $700 server either because it has 4 cores. This is very frustrating since I specially purchases one of the cheapest servers with a good CPU not thinking that MS now want to charge premium for my 4 User network.
Well I do not have to budget to buy now the enterprise exchange which has a few extra features that we do not need at all. So I will probably end up reusing the old server which is a dual Pentium 1GH to run exchange.

This brings me to the question which is: what is better to install the exchange on the SBS and making the SBS a domain which is then joined as a secondary domain to the enterprise server or should I make it a simply file server as part of the main domain.

Also is there any issue running this on a separate server (pro/con). Is there anything special I need to watch out for? I guess if I would make it a sub domain I would need to manage 2 active directorys?

Thank you for the assistance on this. Any tip is welcome. maybe there is even a way to get exchange installed on my 4 core cpu without spending another 2 grand.

Best wishes,
Who is Participating?
Brian PiercePhotographerCommented:
I you want to install Exchange 2007 you must install it in a 64bit version of windows - that rules  out SBS server - you must select a 64bit version of Server 2003

As for best practice exchange is always better when on a machine which is NOT a domain controller
ThomasPartnerAuthor Commented:
So you are saying it has nothing to do with my CPU but with the fact that Exchange 2007 ONLY runs on 64bit environments? This is amazing that all users now are expected to have a 64Bit system just to have a small in house mail server.
I guess that a 64bit windows can only be installed on computers with a specific 64bit CPU?

I wonder how small business can afford systems like this if you have to upgrade everything just to use this stuff.

Thank you for the assistance on this, I now have to find some solutions for this but I think I keep the SBS and use Exchange 2003. I simply need a email server that works with MSCRM so 2003 should do the trick I hope.

Best wishes,
Dave StringfellowIT managerCommented:
SBS 2008 will be 64bit only too.
ThomasPartnerAuthor Commented:
Thanks for the info, so it will be version 2003 that we keep using.
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