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