Oid data type question

I'm relatively new to psql. I have created a database with Oid data
types
in it. I am now trying to populate the tables with data, from a file
but
I am not sure how to get the path names into the Oid fields. I have
tried
commands like:

insert into gene values('cI', '1', lo_import('filename1'),
lo_import('filename2'), 'control');

This has not worked, please help. Any help is appreciated.