What SAP Business Objects Web Services to use with XI3.0

I'm new to BO and is tasked to install it.

What I've installed already is the BOE XI3.0 version and now want to install Xcelsius 2008 Enterprise.

What I can not figure out from the Xcelsius manual or SDN or OSS is what the Business Objects Web Services are the manual instructs you to install with Xcelsius.

I did find something called

BusinessObjects Web Services XI for Windows and downloaded it but is not sure if this is what I need to install as the business Object Web Services on XI 3.0

Can someone please direct me in the correct direction

Thanks in advance

Liezel