Sap netweaver 2004s/BI7.0

We are doing fresh implementation on SAP BW(sap netweaver2004s/BI7.0).As new version having lot of changes we need guidance.

After activation of standard infoobjects,cubes and datastore objects how to load the data into bw from SAP(ECC5.0 source system)?.What are the next steps we need to do?..Pls help us with the step by step in detail.

Thanks in advance for your help

Regards,

Soujanya