Component Load Balancing (CLB) for Serviced components

What are the system requirements for doing Component Load Balancing
(CLB) with COM+ in .Net .

ours is a migration project we have asp Pages with VB COM Dlls.
we are migrating Asp pages to Asp.Net but existing components in VB
still be used and newly developed pages will be using .net
components. We plan to deploy the COM dlls and Service dotnet dlls in
to COM+ in the middle tier cluster and provide load blancing .

Microsoft has discontinued issuing fresh licenses for the Application
center .( http://technet.microsoft.com/hi-in/l.../bb734929.aspx)
But I am not clear what is the replacement path ? have any body done
that?

How to provide load balancing at application server cluster in such
scenario ?.