Credits: 

Disabling the Vampire Killer's Whip Dangle Code - DevAnj
Better Superjump for Julius - Masked Dedede
DSVania Editor - LagoLunatic
The Hack itself - Oersted

The Jist of this!
Play as Model ZX, from Mega Man ZX, or Model Omega, from the same game, in this Julius Mode hack. All Content from the original game is pre-unlocked, allowing Julius (ZX / Omega) Mode to be played immediately. 

This hack features 2 fully Customized Playable Characters, Skills, and animations.

Differences in the Omega Patch
You play as Model O / Omega.
Omega is faster when running.
Omega has signifigantly higher offense and defense.
Omega has stronger and larger melee attacks.
Omega is fully invincible when using the Super Jump.
Omega takes ownership of your soul.
Omega has signifigantly smaller hurtboxes during some attacks, making it harder for foes to hit him.

CHANGELOG

1.0.1
Fixed a minor typo involving Yoko's cutscene.
Fixed a stray pixel on Omega that was pissing me off.
Improved Omega's Hitboxes while superjumping.
Increased Omega's offense even more.
Adjusted some frame timings for attacking, making ZX and Omega freeze up less.
Made some minor adjustments to ZX's Crouch attack animation. It's now slightly faster.