Active Directory, Coexsistance of .adm and .admx based policies

We have just added our first Windows 2008 R2 server to our existing 2003 domain and all is working correctly. We have existing policies based around the old adm technologies, these policies are  applied to windows XP, vista and 7 machines.
We want to add the new admx files to the domain, I am perfectly happy doing this, but my question is about coexistence of adm and admx based policies.

Will the settings that I have in the adm  (2003) based policies still be applied to the clients? What I don't want to happen is I put the new policies in place and they then stop the application of the existing policies, I will then migrate the old policies to the new policies overtime as they could do with a clearout as there are some odd settings that were done years ago are probably a hinderance now.



Thanks
bentham1Asked:
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Felix LevenSenior System and DatabaseadministratorCommented:
Old and new administrative templates can coexist.

Settings generated by .ADM files will appear under the Administrative Templates -> Classic Administrative Templates (ADM).

In my experience most of the self created ADM files/options are already present in some of the new ADMX files. Migrating old ADM files to the new XML files will take some time so.
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compdigit44Commented:
Here are some good articles that helped myself when I was wondering the samething as you about ADM and ADMX files....

http://technet.microsoft.com/en-us/library/cc709647(v=ws.10).aspx
http://msdn.microsoft.com/en-us/library/bb530196.aspx
http://www.microsoft.com/download/en/details.aspx?id=15058
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bentham1Author Commented:
Many thanks, sorry I took so long to answer, but Iwas up to my neck and forgot about it.
Just what I needed to know.
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