im a WE10 player:
hey, we are talkin too much about da r2 button, but...what about da r1?
if you use R1 instead of R2, you will make a tiny, soft, and very damn cool shot to pass the ball over the goalkeeper when he tries to broke your ankles, remember romario? he made near 80% of his career goals using this glamurous way to beat the goalies in one on one situations...
try it with: any player in a one on one vs. the gk.
i will try to explain how the WE-PES shooting system works:
if you shoot using square only, u´ll get a mid-power shoot (ex: germany 06, brazil-croatia, kaka).
try it with: players with good accuracy and shoot technique (ronaldo, zlatan, rooney, sheva, zidane, scholes, román)
if you shoot while running with r1, you shoot a rocket...
try it with: rooney, c. ronaldo, scholes, adriano, ballack, gerrard, cisse, davids, and with any player you see could have chance.
if you shoot while running and then press r2, you will get a strong mid high and very controlled shoot (great for trying over the 16.50 line) everyone
if you shooot while holding L1, the kicker will try to pass the ball over the goalie´s head, with a hiiiigh and long ball...
try it with: any player who can shoot while the goalie is out...
if you shoot and then tap L1, the player will shoot a softly and a little high ball to "wash" the goalkeeper, this is one of my favorite ways to score, with a little practice, you will be able to make "futbol champagne" kind of goals just like the del piero´s one vs. germany...
try it with: any forward when the goalie is running to you...
and this is the way to shoot a REAL NUCLEAR BLAST:
its works mostly with shoot-powerful players, with the ability to shoot well from long distances...you have two options: to throw the ball a little forward (L1+R1), or while you are long running (R1 many times), then press square as many times as you can until you reach half power bar...try it with adriano, ballack, riise, seedorf, cisse...it is really cool, but you will need a lot of space to make it...
hope this could help....
MANU FOREVER...
(sorry about my broken english)