Problem inserting data

Hello everybody.

I''ve just converted an access database to postgres. The conversion
was ok, but when i'm trying to insert data on some tables with boolean
types from a Visual Basic application i receive an error. A sample:

table example, with firs field of integer, second of type text and
third of type boolean

the query: INSERT INTO EXAMPLE VALUES (1, 'text', 0)

When i used access this worked fine, in boolean types 0 is false and
1 is true, but in postgres (8.1 and 8.3 version) i receive the next error:

column "premarco" is of type boolean but expression is of type integer

My question is, can i force postgres to accept integer values as
boolean without changin query to INSERT INTO EXAMPLE VALUES (1, 'text',
0::boolean). This is a problem because if I have to do this i will have
to test about one hundred queryes

Thank you very much