SCUP installation

Hi,

I have a primary sccm sp2 server (w2k3 r2 x64) and a remote sup (w2k3 r2 x64), and I now want to setup SCUP 4.5.

My first question is:

1. Is there just one download for 32 and 64bit servers? I can only see one so I guess it must be?

2. Can I just install SCUP on the primary sccm server where the WSUS database is (i.e. I guess I don't have to install it on the remote SUP server)?

3. Do I just create the self signed certificates on the primary sccm server and the clients, and I don't have to add them to the SUP server as well (i.e. I don't need to alter the SUP server config at all)?

Thanks