Exposing in-proc object through out-proc object

[asno...@gmail.com]

I have a abc.dll exposing few interfaces, say IA, IB, IC
abc.IDL
IC
{
get_name(BSTR**);
}

IB
{
get_IC( IC**);
}

IA
{
get_IB( IB**);
}

I would like to expose this abc.dll throught an Out-Proc-server
Xyz.exe / Xyz.IDL
ICreate
{
CreateIA(IA**)
};

What is the best way? I think I should have to merge these IDL in to
one, first. PLease let me know how to proceed.

Thanks
Ramesh