Selections in Export Datasource infopackage

Hi,

I've to initialize huge - really huge amount of data from an ODS to successive ODS and a Cube. If try to initialize all at once.. activation fails.

I don't think I can initialize request by request.. can I?

Anyway.. I tried to bring some fields in the infopack selection, but I could not change the export datasource (8<odsname>).. as per notes 630854, 499404.

Can anybody suggest how I can achieve this..

Many Thx.