Okay, I figured out how to use a Sixaxis properly with this.
- Do like >>11 said.
- Install this: http://www.redcl0ud.com/controlmk/index.html
- Start ComtrolMK and import the attached custom profile I built for Cave Story.
- Configure Cave Story to use KEYBOARD, not game pad.
Here are the mappings:
Up/Down/Left/Right - duh
Select - Map
X - Jump
Square, L1, R1 - Fire
Circle - Inventory
L2, R2 - Switch weapons
The only thing not mapped to a button is the Escape key, to prevent accidental resetting/quitting; if you just need to pause; use Circle (inventory).