PS1 Twisted Metal 2 Mod: Dark Tooth Expansion

Project Title: PS1 MIPS Assembly / Ghidra Patch for Twisted Metal 2 Mod

Description:
I am looking for an experienced PS1 reverse engineer and MIPS assembly programmer to fully implement the final boss "Dark Tooth" as two separate, playable characters on the vehicle selection screen in Twisted Metal 2 (US NTSC version, SCUS_943.06).

The project builds on "edgbla's" core mod and "TechieSaru's" models. I will provide the modified SCUS_943.06 executable file to the chosen freelancer.

Requirements (Strictly MIPS assembly patching, no custom external graphics needed):
1. Two Standalone Menu Slots: Expand the character select screen to create two separate slots using the game's existing portraits:
- Slot 1: Dark Tooth Ice Cream Truck (Phase 1)
- Slot 2: Dark Tooth Standalone Flying Head (Phase 2)
2. Boss Special Attack for the Truck: Patch the input handler so that triggering the special weapon fires BOTH the standard ice cream cones and launches the giant flaming clown head projectile, exactly like the original Phase 1 boss fight.
3. Boss Special Attack for the Flying Head: When playing as the standalone flying head, its special weapon must fire its authentic boss weapon (the massive homing pink plasma ball / projectile ID 0x15) along with the ice cream cones.
4. End-Level Cleanup Fix: Ensure that when a match ends, the game's memory cleanup does not despawn the head model or break the vehicle state during the victory screen.

Budget: My absolute maximum budget for this task is 40 USD. It's a quick MIPS patch job since all 3D assets are already integrated. Please only bid if you have proven experience with the PS1 (R3000A) architecture.