I use a PS2 controller as well mine is...
Digital pad is D-Pad on PS2 controller
start is start
Movement Stick is Left Stick
C-buttons is Right Stick
A=X , B=O , L=L1 , R=R1 , Z=R2...
and I like it, so go for it if you want
People who ask these questions really have no imagination. Try out a few things, it's not like you can't change things around later.
But to answer the question, for me:
left stick --> analog stick
right stick --> C buttons (not good if you want to press more than one C button at once, which rarely happens)
X --> A
square --> B
O --> Rapid fire A
delta --> RF B
R2 and L2 --> R and L, respectively
R1 and/or L1 --> Z
D-Pad --> D-Pad