I think you are probably referring to the "Drink Drivers' Rehabilitation Course. This is usually offered to first time offenders convicted of driving with excess alcohol.
If succesfully completed and paid for it results in the period of disqualification being cut by 25%.
The endorsement, as Chris says, remains for eleven years (active for ten) and other penalties such as any fine, community penalty or imprisonment as well as costs are unaffected.
Penalty points are not awarded for excess alcohol as the offence carries a mandatory disquaification.