As Fritz has mentioned several times and there always appears to be a request for this - here is the link for the migration documents as well as the path.
Link to the thread
Link to the marketplace:
Navigate to the Technical information center > Migration
Direct Links to the documents on the Service Marketplace:
Performance Migration:
https://service.sap.com/~sapdownload/011000358700000500562009E/Cookbook_Perf_Migration.pdf
Migration Guidelines:
https://service.sap.com/~sapdownload/011000358700000500572009E/Guideline_ISMW.pdf
Initial CRM Download Performance
https://service.sap.com/~sapdownload/011000358700000101082010E/Perf_Initial_Download.pdf
regards,
bill.