2 newbie questions

1. I'm porting a clients database over from access(!).  In order not to have
to tamper with the code, I need to rid myself of the oid column.  I have a
workaround which involves editing the code, but I was just interested if the
"getting rid of the oid column" was a possibility?

2. I have a date/time column in access... should this datatype be datetime
in postgres... and how do i format the text to import it into the postgres
file using copy?

All replies humbly appreciated! :)

Helen