Don't quite know what you mean by the first part of the post. Do you want to know how to do some command grabs?
For the second part, I kinda addressed this one in the gameplay glossary. Keep in mind that the move that you use for a kara throw varies from character to character. Most people advise trying to master the timing by using Akuma since his kara cancel uses toward+ medium punch. When you kara throw with Akuma you should hear him grunt before the throw to tell you that it worked:
Kara Cancel
certain moves in fighting games require the player to do 2 tasks simulataneously, such as pressing 2 buttons at the same time or executing a QCF and pressing a button just as the QFC finishes. Since it would be very hard to actually perform 2 actions at exactly the same time, the game allows one to perform the designated actions within a short period of time. This can be exploited to one's advantage, since the game will start to animate the action triggered by one of the button presses quickly after it happens. The player can then complete quickly the command for another move that uses the button that was pressed to preempt the attack that was animating and start a different attack...
A more common use of this trick is the KARA THROW, which is when one performs a motion throw after an attack's animation has started. This can often have the effect of moving your character closer to your opponent, due to the animation of the cancelled move making your character move closer to your opponent. The net result is increased throw range and a bit of misdirection in the form of the half-executed attack that was cancelled. This can be done with every character in Street Fighter 3: 3rd Strike since every throw is a motion throw ( the normal throw command is weak punch+weak kick).
