New to BW 2004s

Hi Friends

I am new to BW2004s.

I have created a generic datasource from CRM .

I had replicated the datasource.

Now what is the next step for me to create

1. Should i create an infosource / or DTP and how should i proceed

I need to create an ODS and then move it CUBE

Please help me.

Regards

sundaresan