Hit the Courier -> Distribution + Hit the Courier -> Cabmaggedon CP is JP only, Cabmaggedon works on both JP and INTL. Cancel Cabmaggedon with Taxi Driver.

Shakedown Dupe & Pass -> Pizza Boy http://www.speedrun.com/gtavc/thread/pd7ju/1#4tasx International (confirmed crash on Japanese)

Trial by Dirt Taxi & Vigilante http://www.speedrun.com/gtavc/thread/8bp2n International & Japanese

~~VIPStBCP should be only International (not tested on Japanese) ~~ Prevents completing the rest of taxi missions and taxi driver.

Cop Land -> SSA Race -> Demolition Man/Trojan Voodoo International (confirmed crash on Japanese)

Vigilante->G-Spotlight->Paramedic http://www.speedrun.com/gtavc/thread/z2fbh International & Japanese

KYFC -> The Job http://www.speedrun.com/gtavc/thread/6bxyv International & Japanese

Recruitment Drive -> Love Juice Psycho Killer can be duped after. Passes when the Psycho gets away. International (crashes on Japanese)

TAXI DRIVER -> Checkpoint Charlie http://www.speedrun.com/gtavc/thread/ii9gi Make sure to have a key bound to both submission and look behind One script is active. Several ways to kill it including Ocean Heights buy, Paramedic and Test Track. International & Japanese

**Spilling the Beans -> RC Raider Pickup ** http://www.speedrun.com/gtavc/thread/7o8hu International & Japanese

Alloy Wheels of Steel -> StB (Skips going to Malibu) International (not sure about JP)

The Job + Keep Your Friends Close... International & Japanese

Bombs Away Dupe -> Friendly Rivalry International & Japanese

Dirtring -> The Driver International (not tested on Japanese)

Love Juice -> Spilling the Beans -> Pizza Boy Japanese

Cannon Fodder -> Spilling the Beans (Allows for RC Raider Instapass right after) International & Japanese (The line used on JP is "Hey, amigo. Good to see you could make it"

Bombs Away Dupe -> Friendly Rivalry -> Spilling the Beans -> Distribution International (not sure about JP)

The Shootist -> Demolition Man Japanese Only

Trojan Voodoo -> Spilling the Beans Japanese Only

Crashes on mission completion

Recruitment Drive -> Publicity Tour International

Collection of stuff mentioned on forums and IRC, mostly by Patrick and husho. I'll try to update the thread with video examples and new instapasses as they're being found.

It's still better to discuss individual instapasses in their own threads, but I thought it would be good to have a hub where all information is easily accessible.