Oracle Database Discussions

I have installed a full 64-bit 11g R2 install on my Windows 7 D: drive, installed two DB's, worked great. Then I realized application I need to support requires 32-bit client (for drivers) so I installed the 11g client also.
My problem is that my registry only shows one ORACLE_HOME--the 64-bit full install whereas Cognos reqs to point to 32-bit client.

Sqlplus in 64-bit works fine (D:\oracle\app\dock\product\11.2.0\dbhome_1\BIN\sqlplus.exe) whereas the 32-bit client sqlplus (D:\oracle\client\app\dock\product\11.2.0\client_1\BIN\sqlplus.exe) does not work. The error is:

ORA-12560: TNS:protocol adapter error

If I open cmd prompt and navigate to 32-bit sqlplus under client this WILL work to login (but then I noticed it was using the 64-bit ORACLE_HOME and PATH settings if I typed set). In order to fix Cognos, I changed my ORACLE_HOME and path to point to the 32-bit client (i.e. from D:\oracle\app\dock\product\11.2.0\dbhome_1 to

ORACLE_HOME = D:\oracle\client\app\dock\product\11.2.0\client_1
PATH = D:\oracle\client\app\dock\product\11.2.0\client_1\bin;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\;C:\Program Files\ThinkPad\Bluetooth Software\;C:\Program Files\ThinkPad\Bluetooth Software\syswow64;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\

Guess what? This stopped both the 64-bit and 32-bit sqlplus from working, even after bouncing the computer. Now the listener (64-bit) OracleOraDb11g_home1TNSListener will also not start either.

Sooooo, I think I need to set the OH and PATH back to the 64-bit as that is what the Listener requires but any ideas how to get the 32-bit sqlplus to also work?!?

Thanks in advance for any help!