Programming Key Fobs with 1 or 2 buttons?

[Smiley69]

You press the big button to lock the car and the second smaller button to activate the deadlocks.

No. Big button locks on first press. Deadlocks on second press. Little button unlocks.

That may have been for your cars, however my my Ph1 was locked and unlocked using the big button only and deadlocks with the small button. The car was a '94 so the key shape/layout/functionality may be slightly different.

I know my parent's 307 has a large and small button on the key fob.