credits.img = end credit backround screen
drivebck.img = drivers selection backround
GarageBK.img = Garage Backround screen
lapbck.img = background image for the Fastest Laps screen
loadbck.img = loading screen (track to raceday load)
mainbck.img = Main screen
Multibk1.img = Multiplayer main connection screen
Multibk2.img = Multiplayer chat/ready screen
Optback.img = Options screen
Optbck2.img = background image for the Graphics/Controls/Sound Options screen
racebck.img = Raceday backround screen
recbck.img = Records (Race & Lap) backround screen
reslbck.img = race & qualify results backround screen
setupbck.img = race setup backround (not garage)
trackbck.img = Tracks selection screen
G_Weight G_Shock G_Spring G_Tire G_Camber and G_Gears. size would be 365x265

3 Layer Buttons:
b_career.img = Championship button (3 layer button)
b_Graph.img = Graphics button in Options menu screen (3 layer button)
b_Con.img = Controls button in Options menu screen (3 layer button)
b_Sound.img = Sound button in Options menu screen (3 layer button)
b_Replay.img = Replay button in Options menu screen (3 layer button)
b_Opt.img = Options button on Main screen (3 layer button)
b_back.img = Back button on various screens (3 layer button)
b_paint.img = Paintkit button in Drivers Menu Selection screen
B_Qualif.img = Qualify button in Race Day screen (3 layer button)
B_Garage.img = Garage button in Race Day screen (3 layer button)
b_setup2.img = Setup button in Race Day screen (3 layer button)
Exit.img = Exit button on Main screen (3 layer button)
ITZone.img = Beat the Heat button, Main Screen (3 layer button)
Multi.img = multiplayer button (3 layer button)
Pract.img = Practice button in Race Day screen (3 layer button)
Race.img = Race button in Race Day screen (3 layer button)
radio.img = multiplayer connection speed button (also graphics resolution) (2 layer button)
rtp.img = Race the Pro button, Main screen (3 layer button)
select.img = Select button on various screens (3 layer button)?
Srace.img = Single race button (3 layer button)

And these are the ones to use with mkstamp:

Stamps:
bars1: 331x12, orange bar used in yf, postrace
bars2: 331x7, ditto
bars3: 138x7, ditto
bars4: 105x3, ditto
t-escape: 178x34
t-grid: 331x57
t-inrace: 331x46
t-post: 331x45
t-result: 308x49
tdamage: 180x20
(tingame contains "on-board" as element 3/4 of the stamp roll)
tingame: 180x26, is x4 stamproll
tirepit: 180x38, is x2 stamproll

Misc. Stamp Descriptions:
t-escape: "ESCAPE MENU"
t-grid: "HASBRO INTERACTIVE PRESENTS THE STARTING GRID"
prehead: very begining header?
t-inrace: IN RACE SUMMARY
t-post: POST RACE SUMMARY
t-result: UNOFFICIAL RESULTS
tdamage: "damage"
tingame: 4xroll: (leader board,race board,on board,lap times)
tirepit: 2xroll: (pit adjustments, tire status)

Now as for a 3 layer button.You would just create a new image in Paintshop Pro or Photoshop..depending on which you use.I use Paintshop Pro 7.For buttons,and I'll use the "Single Race" button as an example,they need to start off as 178 x 37.Paint,or put your text in this image.Then create another image and size it 178 x 111.Now the first image you made,you will copy and paste into the second image as a layer.Then do 2 more at the first size of 178 x 37 and when those are done,paste them also in this bigger image as layers.You will have to move them so they are 3 layers on top of each other like so:

Single Race
Single Race
Single Race

Then you'll need to use the Magic Wand tool and select everything around your text and make an alpha channel with it.The better,and more readable the text is,the less problems you'll have making the alpha channel.Once you have it with the alpha,save it as a .tga.Then when you have that done,you are ready to make the .img file.This would be the entry using mkimage:

mkimage srace.tga srace.img /a 3

As stated a thousand times,you'll need to get familiar with typing the commands in. As you can see the one above has flags. One for an alpha: /a

And one for the amount of layers the original .tga had: 3 