Using MTS/COM+ is the easy way(o using SOAP).

Simply go to admin tools/Component services, create a new package, put the DLL of the COM server here (you need build a multithread DLL). Rigth click in the package,click in Export, then in proxy app, and this generate a installer for auto setup in each machine client. The in each client, run this setup and that is all,...

With MTS is similar...

(Maybe you need run DCOM98 in a win95/98 computer for this work)

Warning: If yopu pass back ADO recordset get ready for troubles, norml datatypes is Ok