Read this post i think its quite good especially how others find out how to overcome the sand etc http://forum.gamescampus.com/viewtopic.php?f=26&t=55318&sid=a27a2eb989b8f1238c0b7bb96a2dc052
Basically all you do and ive tried this it works is this:
1 Check your lie, if its flat ok
2 find distance from ball to pin for this e.g. its 12 yd which equates to 20% for me on a normal chip
3 then press and hold shift and press down arrow key once for one dot of back spin
4 add 10% to your original 20% = 30%
5 then hit your ball at 30% and it should land very close to the pin
I have tried it a few times and it works very well for me, I used to struggle on rufus but that got me a round worth -10 the other day.