Delegate access for Bitlocker recovery on an OU only?

Can someone give me the steps to delegate access to an AD group for Bitlocker recovery passwords on an OU only? 

I have read the articles that have the vb script and talk about using ldp.exe,

http://technet.microsoft.com/en-us/library/cc771778(v=ws.10).aspx#BKMK_TestingRecovery

http://blogs.technet.com/b/craigf/archive/2011/01/26/delegating-access-in-ad-to-bitlocker-recovery-information.aspx

but I don't know how to do this specifically on an OU, and I need the steps to connect, bind, etc with ldp.exe as I never use this tool.

I tried the following but it doesn't work (bummer, because it's nice and simple)

http://blog.nextxpert.com/2011/01/11/how-to-delegate-access-to-bitlocker-recovery-information-in-active-directory/

Please give me instructions step-by-step to give a group bitlocker recovery password info on the tab in ADUC for a specific OU only (AD 2008 R2) - thanks!