I think I misunderstood you. If you are using pervasive, I do not know how to do this. As you have said, this is not in the .ddfs. If you are using MS SQL Server, launch the following from Query Analyzer and it will give you the modified screens and who the user is.
select screen_id, screen_name from adscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from apscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from arscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from bbscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from bcscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from bmscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from cmscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from crscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from edscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from glscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from hzscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from imscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from jcscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from jescrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from lpscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from mcscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from mrscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from msscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from oescrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from pkscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from poscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from ppscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from prscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from scscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from sfscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from srscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from ssscrfil_sql where (screen_name <> 'MACOLA') union
select screen_id, screen_name from syscrfil_sql where (screen_name <> 'MACOLA')
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