Enter the following at the 'Cheats' menu:

XXX RATED CHEAT - All Levels
65 SWEET RIDES - All Bikes
CHAMPAGNE ROOM - All FMVs
MASS HYSTERIA - Stage Select
BULLETPOINT - Park Editor
ITCHI594 - Itchi's Bikes
JOYRIDE18 - Joyride's Bikes
ELECTRICITYBAD - Amish Boy
AMISHBOY1699 - Amish Boy's Bikes
HELLKITTY487 - Hellkitty's Bikes
KARMA311 - Karma's Bikes
LATEY411 - La'tey's Bikes
NUTTER290 - Nutter's Bikes
RAVE10 - Rave's Bikes
SKEETER666 - Skeeter's Bikes
MANUEL415 - Manuel's Bikes
MIKA362436 - Mika's Bikes
TRIPLEDUB922 - Tripledub's Bikes
TWAN187 - Twan's Bikes
Z AXIS - Increase Speed
MAKEMEANGRY - Green Skin In Create-A-Rider
FLUFFYBUNNY - Happy Bunny Mode
HEAVYPETTING - Super Crash Mode
3RD SOG - Night Vision Mode
GHOSTCONTROL - Guided Ghost Rides
PARABOLIC - All Gaps Visible
SHOWMETHEMONEY - Las Vegas Level
IOWARULES - Rampage Level
THATDAMLEVEL - Dam Level
UNDERGROUND - Roots Level
SHOWMETHEMONKEY - Launch Pad 69 Level
BAABAA - Sheep Hills Level
BOYBANDSSUCK - Syracuse Level
THISISBMXX - Bonus FMV #1
KEEPITDIRTY - Bonus FMV #2
BOING - Dam FMV #1
IFLINGPOO - Launch Pad 69 FMV #1
PEACH - Launch Pad 69 FMV #2
LAPDANCE - Bronx FMV #1
STRIPTEASE - Bronx FMV #2
ONEDOLLAR - Sheep Hill FMV #1
69 - Sheep Hill FMV #2
FUZZYKITTY - Syracuse FMV #1
MICHAELHUNT - Syracuse FMV #2
BOOTYCALL - UGP Roots Jam FMV #2
BURLESQUE - Rampage Skatepark FMV #2
HIGHBEAMS - Las Vegas FMV #1
TASSLE - Las Vegas FMV #2
DDUULRRLDRSQUARE - End FMV