Updating a out of the box lookup

Document ID : KB000110048
Last Modified Date : 22/08/2018
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Is it possible to add a JOIN and SELECT to the OOTB Query Lookup OBS_BROWSE_FLT_PRJ? 

We would like to add data to the OBS field.  This will help the user find the right OBS when updating a project as some OBS have the same name
All support PPM versions
Updating an out of the box lookup is unsupported.

You can add data in the OBS field under Administration>>OBS.  This field holds up to 120 characters.