Some questins from a newbie user

Hi
I have just purchuaded RTC SDK v.9.50 in order to use it for migrating some working applications from another 3tier framework as i had serious stability problems.
As a new user i have the need of some advices from the RTC community

1st appl to migrate is connected to a PBX with the following - main functionality -
a) receive commands from the clients for call a phone number or close an already open line(conversation)
b) processing any incoming call, find using the incoming phone number and a database where is connected and broadcasting the incoming call with the caller info to any interested client for getting it and establish a phone line connection.
c) monitoring & administrating - server side - the open lines and generally the PBX activity
The number of clients and available PBX lines are about 100, so there will be a heavy enough traffic. The application -server & client size - is a Windows VCL one.
Which of the given examples you propose to use as a start point for the implementation of above application?

2nd appl to migrate i a 3tier client/server where between other things the client get a dataset locally, makes changes and send the changed data to be resolved to server.
RTC uses TRTCDataset.
Which is the proposed way to convert between TRTCDataset and Delphi TDataSet in order to use Delphi data components( as the code i found - DelphiDataSetToRtc, RtcDataSetToDelphi etc - are located in files in Legacy folder, so i should not use them)?

Thanks in advance for any advise.
Best Regards

A.Kyriakos