Trying to use ODAC on 64 bit Windows 7 with 64 bit Oracle 11g?

I have been trying to connect to Oracle 11g with VS 2010 .NET Framework 4.0 on Windows 7 for about 5 days with no luck.
Background: VS 2010, .Net Framework 4.0 and Oracle 11g 64 bit are running on the same maching.
I have found that are two versions of the 64 bit ODAC.
1) The XCopy bersion and 2) the Oracle Universal Installer version.
To install the XCopy version, I right click on the cmd window, change to the folder where my xCopy install is and type install.bat all d:\oracle\myoraclehome odac just like the documentation says. The files are created in my Oracle home and there are registry keys under HKLM\Software\Oracle like the documentation says. I don't have a clue how to prove weather it's doing anything usefule though. When I go to VS 2010, I don't have System.Data.Oracleclient of Oracle.DataAccess.client or any other namespace that can talk to Oracle. How would I test the XCopy version and see if it is actually able to do anything?
I like the Windows Installer version much better and set it up just like the readme.txt said to. I used the Oracle Data Access Components for Oracle Client 11.2.0.2.1. I wound up with two oracle homes, one for my server and one for the ODAC install. I copied tnsnames.ora and sqlnet.ora over to the odac client home's Network\Admin folder. From my server's oracle home, I ran sqlplus and was able to successfully login to the server. I liked the fact that it came with sample code and I saw that the Oracle.DataAcces.client dll was added as a project reference. I ran the samples with my userid and password and got a TNS Adapter error.
Since the Oracle server is on the same server that everything else is on, I ASS-U-ME that I would want to install the Oracle Data although I didn't see it documented anywhere. I tried creating it in a different directory, but it says it must be installed on top of an existing oracle home. I tried creating it in my oracle home and got err message OUI-10044 - The selected oracle home location already contains an oracle home or APPL_TOP created while running a different OS.
Can someone tell me how to correctly install either one of these and test it to make sure it is working?
TIA I know someone on planet Earth must be using the 64-bit odac to connect to Oracle,
George

George,
It sounds like I have the same setup as you and I am no expert on Oracle install issues but VS 2010 is 32bit. You need to install the 32 bit version of ODAC to make VS all happy. I was under the impression ther was no 64 bit version of ODAC? Then again I am no expert on the topic.
I then installed the 64 bit xcopy version, decided upon the location for tnsname and then defined TNS_ADMIN. All works well. I create most of my exe's as AnyCPU and Windoze/Oracle seems to figure out what to do.
r,
dennis

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