Reuters - Sat, 20 Mar 14:05:00 2010
Ireland went into the game still with a slim hope of retaining the title and made a perfect start as Brian O'Driscoll scored under the posts after 11 minutes.
But Scotland fought back to record a famous victory and avoid the Six Nations wooden spoon as Parks landed a kick from the left touchline with less than 90 seconds left on the clock.
The kick denied Ireland a fifth Triple Crown in seven years, and ensure that their final rugby match at Croke Park ended in defeat.
"It feels fantastic I think we've deserved a lot more than we got in this championship and today was a just reward," Parks said.
"We came here to spoil a party and that's what we've done and it's going to be a good night out," added the Scotland fly-half, man of the match three times in the championship but on Saturday taking the award for the first time in a winning team.
Parks began the game as he finished it, launching a huge kick into the hosts' corner to relieve early Irish pressure and from the resulting phases, opening the scoring with a penalty six minutes in.
That lead lasted only a few minutes as Ireland fly-half Jonathan Sexton, lively early on, exchanged quick passes with centre Gordon D'Arcy for the third time in 10 minutes and sold a superb dummy to put O'Driscoll through for his first try of the tournament.
Scotland, who had struggled to score tries all year, replied just as quickly by catching Ireland napping on the left wing where number eight Johnnie Beattie bulldozed past three defenders to touch down in the corner.
Ireland resumed control of possession but silly mistakes that dogged them for the rest of the game cost them any meaningful opportunities, and Sexton missed a chance to retake the lead on the half hour mark with a long but gettable penalty.
Parks had a much easier chance in front of the posts three minutes before the break and added a quick drop goal to give Scotland a seven-point half-time advantage.
Sexton, who has struggled with his place kicking all tournament following a cool debut late last year, missed an early second-half shot before Parks extended the lead to ten points after 47 minutes.
With experienced Munster fly-half Ronan O'Gara ready to come on, Sexton clawed three points back with his last kick of the game four minutes later.
Parks missed a tricky effort of his own with a quarter of the game left and Scotland's lead was wiped out 15 minutes from time after O'Gara showed Sexton how it's done by converting wing Tommy Bowe's third try of the campaign from a tight angle.
Parks traded penalties with O'Gara, the Munster man's second successful effort giving the home fans hope of departing Croke Park for the rebuilt Lansdowne Road on a high.
However they ended their four seasons at the home of Gaelic sports on the same losing note they began on following a great chase, Ireland were penalised for holding on.
Parks duly slotted the kick to give Scotland their first championship win over Ireland in nine and only their second Six Nations away win in 20 games.
Coach Andy Robinson, who saw his team throw away victory in Cardiff and draw with England last week, said: "We got a bit of luck at the end of the game, got the penalty and Dan kicked a great kick but I think the endeavour, the way we've tried to play this season, the guys deserved the plaudits.
"I'm really pleased with the way the team have approached the game. We scored a try, that made a real difference, and we kept the composure right to the end.
"Ireland played really well at the start but we held in and adjusted to the pace of the game and performed really well."