Although Paterson is not underestimating Romania, the veteran hopes Scotland's meticulous build-up pays off.
The 33-year-old, who will become the first Scot to appear in four World Cups, said: "It seems a long time since we met on June 4 to start the preparations and the first game was what we were targeting.
"Now we're here, we feel well prepared. We're just desperate to get out and put it into action.
"We have to deliver now - it's as simple as that."
Paterson featured in Scotland's 42-0 win over Romania four years ago and knows what to expect.
"Romania are a physical side, a good side. We played them in 2007 and won reasonably well, but that was at home, that was at Murrayfield," he added.
"I've played against Romania away from home on a couple of occasions and they're a tough side with top players.
"Everybody targets the first game. It will be a huge challenge but we're looking to perform well and hopefully win."
Four years ago, Paterson's immaculate kicking display throughout the tournament was marked daily by French newspaper L'Equipe.
Paterson produced a faultless kicking display in France four years ago, and he will bid to add to his record haul of 786 points.
But he was not thinking about his prolific record with the boot as he prepared to depart for kicking practice.
He added: "Judging by the wind in the hotel room last night it's going to be a bit tricky.
"It's a duty I'm given when I play and I'll do it as best I can. The practice is important."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
$29.99
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.