Increasing player's attributes:
Go to "Coach Options" > "Manage Roster" > "Edit Player" to increase your players' attributes.
During gameplay, pause and go to Settings then Gameplay Settings. After that, continue until you get to Global Settings then go to User Settings. Now this step takes a while but this setting shows the skill level in different areas, so level all of your skills up to 100. Next, press either L2 or R2 until you get to CPU Settings. Drain all of those settings to 0, pretty much the same as the user settings, except you are draining the skill level. You then continue to play and you can usually shoot half/full court shots and swish them.