Customized report: Replace Object Type

I'd like to create a new macro based on a report (replace object type).

While being asked for the type numbers (old --> new) doing the report i'd like this step working automatically with the macro.

I think i only need to copy the code (replace object type) to a new script and replace that code interrogating the type numbers by fixed code (#65578 --> #42).

My problem's that i don't know which code to replace and how to implement it exactly.

Deeply grateful for any hints and tips.

Thank you.