Add new column

Hi,

I wan't add new column to this table:

CREATE SEQUENCE abo_product_2_user_seq;

CREATE TABLE abo_product_2_user (
abo_product_2_user_id BIGINT NOT NULL DEFAULT
NEXTVAL('abo_product_2_user_seq'),
abo_product_id SMALLINT NOT NULL,
user_id BIGINT NOT NULL,
valid_from TIMESTAMP NOT NULL,
valid_to TIMESTAMP,
debit_entry VARCHAR(12) NOT NULL,
--
PRIMARY KEY (abo_product_2_user_id),
--INDEX (abo_product_id),
--INDEX (user_id),
FOREIGN KEY (abo_product_id)
REFERENCES abo_product (abo_product_id),
FOREIGN KEY (user_id)
REFERENCES users (user_id)
);

But PostgreSQL 8.0.3 adds the new column at the end. I want add this
new column between user_id and valid_from.

Best Regards,
Rafal