Installing Contrib Modules with a Precompiled Binary

I'm using the OS X precompiled binary from EnterpriseDB and want to add the tablefunc contrib module.  I haven't been
ableto find any documentation about how to do this or even whether modules can be added to this binary version.   

I suppose that it may be a good idea to export my databases and compile from source anyway.  I see that Postgres is
runningas a 32-bit application while I have a 64-bit machine and OS (OS X, Snow Leopard.)   

-Aram