The following files reside in .TRK files themselves:

- trkshot.img (428x400 pixels - ALPHA channel required) - image at the track selection screen. The image itself has to be 360x270 pixels, but the whole file's size should be approx 428x400 and the rest area which is not taken by the image must have ALPHA channel. However, this image must be placed in the correct spot, otherwise it will be in the incorrect place in game - the first leftmost and topmost pixel of the 360x270 image should begin approx at the pixel 32x79 (32 - width and 79 - height).

- shot01.img (360x270 pixels - NON ALPHA) - track image at the screen with "Race", "Practice", "Qualify", "Setup", "Garage" modes. This image will apear in the correct place.

- logo01.img (380x115 pixels - ALPHA channel required)- track logo at the top left corner of the track image which is the on screen with "Race", "Practice", "Qualify", "Setup", "Garage" modes. The size of it doesn't actrually matter, but I use 380x115.

- logo02.img (380x115 pixels - ALPHA channel required) - image at the top left corner of the screen with all the times for each driver after race ends. Basically, you can simply make a copy of logo01.img and rename the clone to logo02.img - it will look good and fit perfectly.

- prehead.stp (331x64 ; note: height can be any) - this screen appears right in the beginning of the race when drivers info is displayed. Note that it's not an IMG file, it has STP extension and is converted using a different utility. Also, if you want some places to be transparent then add alpha channel, but it's not required.

* IMG files are converted using mkimage.exe utility, after you made your screens, save them all as TGAs (NON alphaed as 24-bit, alphaed - 32-bit). Then put all TGAs in the same directory where mkimage.exe resides. Then in the command line type, e.g.:
mkimage.exe logo01.tga logo01.img
if TGA has alpha channel then command line will look like this:
mkimage.exe logo01.tga logo01.img /a
( '/a' is a parameter and means that image has alpha channel)

* STP files are converted using mkstp.exe utility, so to convert your prehead.tga file type this:
mkstp.exe prehead.tga prehead.stp
with alpha channel:
mkstp.exe prehead.tga prehead.stp /a

Then after you created all IMG and STP files you must add these file names to your reslist.txt file before packing the track with mkres.exe utility, i.e., open your reslist.txt file and add this after all files:

trkshot.img
shot01.img
logo01.img
logo02.img
prehead.stp

Please do not repost anywhere without permission.

Good luck,
Oleg