Hi my friends,
How can I use the configuration item tab used on Change Requests (detail_chg) to Request form (detail_cr)?
It would require a fair amount of customization to accomplish this. By it's design the "call_req" table (which contains the request/incident/problem information) only contains a reference to a single configuration item.
For Change Orders there's an lrel table, usp_lrel_asset_chgnr, that contains the many to one relationship. You'd basically need to create a customization that acts in a similar fashion
Within ITIL standards configuration items are typically managed at the change level, which is why this lrel exists for change orders out of the box.
This customization is documented here:
Multiple CIs on Request / Incident / Problem (CR to NR lrel/brel)