Windows Server 2008 to Server 2008 R2

I realize server 2012 is out there but corporate hasn't approved it and though I do not think my question is possible, I figure I ask the experts for a second opinion.

Environment:
We have 2 Domain Controllers on Windows Server 2008 32bit. 1 is a VM with FSMO roles/DNS/DCHP/NTP.  The other is physical just with DNS

Question:
I've been the task to upgrade from server 2008 to server 2008 r2.  I know 2008R2 is 64bit.  Is it possible to do an in place upgrade when our current servers are running server 2008 32 bit?  

What would be the best upgrade path?  
Create another VM with Server 2008R2 transfer FSMO/DNS roles then recreate the physical server with server 2008R2 and finally the other VM DC but transferring DCHP/NTP to the new VM DC?

Any suggestions welcomed
ozzalotAsked:
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Is it possible to do an in place upgrade when our current servers are running server 2008 32 bit?  
No, it is not possible to go from 32 bit to 64 bit in-place.

Best path EVEN IF YOU HAD A 64 BIT DC is to ADD a new 2008 R2 DC and MIGRATE to the new DC.  CHANGING the name, and IP.  You can export and import DHCP and OPTIONALLY if you want to rid yourself of 2008 (non R2) you can transfer the FSMO roles and demote.
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ozzalotAuthor Commented:
Lee thanks for your reply. I didn't know you can migrate DHCP.  Any links that can provide some good info?
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Started with a google for Export DHCP 2008 -
https://technet.microsoft.com/en-us/library/dd759224.aspx

More About Exporting and Importing the DHCP Database

As always, if you're not familiar with a technology or procedure you should learn it first in a test/learning environment or hire a professional and pay attention to what they do.
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ozzalotAuthor Commented:
Thank you for you reply Lee and your help.
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Windows Server 2008

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