Probing for DLL's in ASP.Net 2.0

Is there a way to group dll files by putting them in a subdirectory in the
bin directory for ASP.net 2.0 Web Site projects and have the CLR find them?
I tried using <probing> and adding the following to the appropriate location
(<configuration>) in the web.config file to indicate I wanted it to
look in the bin\subbin directory, but to no success. I do not have any
<codebase> defined.

The relevent peices of the web.config file look like:

<configuration>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<probing privatePath="bin\subbin"/>
</assemblyBinding>
</runtime>
</configuration>
My bin directory is under root and my binary is culture neutral so I believe
with the above file the CLR should be looking in:

bin\subbin

Does probing even work for Web projects?

Any help would be appreciated,

Thanks,
Dean