You can follow the rigging in the Victoria instruction books and no problems.
You can download the manual here and look at the instructions as standard
http://www.tiger.com.tw/manual/1__4__2.htmlThis has the sail arm fitted as supplied. This is a one sided sail arm. I used this set up, as it was my first boat.
The Victoria Resource center has full build instructions that include tips for improving performance. There is a step by step build guide.
http://www.victoriarc.org/building.htmOne of the mods they suggest is to use a double sided sail arm set up, this reduces friction and strain on the servo as it balances the pull forces.
The model does not come with a double sided sail arm provided, and so you will need to make one. You can make the arm from any flat long object you have lying around and cut it down to size. Plastic or metal are better as they are smoothe and the line (sheet) needs to run through it under tension. Any stiff flat thing lying around can be modified, including a ruler.
Have a look at the instructions, don't worry if you can't get your head around the Victoria Resource Centre stuff. I built my Victoria according to the manufactureres instructions and she sails fine. The only thing I would recomend is not to fit the deck furniture (wheels and fake pulleys in black plastic) they can cause tangles, I have now removed mine.
Another tip, all the white plastic deck fittings when glued will come off the first time. This is due to the surface of the plastic not being primed. Glue them back and they will be much firmer, some of mine needed a third glue but have not come off again in more than 4 years.