
	Utility for changing background in F1CTXX.DAT files
			 version 1.0
			D.R.racer 2000
                   david.rehor@worldonline.cz

0. First - I take no resposibility for damages this program can or cannot cause.
   So when experimenting with backgrounds - please backup the files you'll
   change...

1. What it does (does not)
  a) This utility is capable of extracting background from F1CTXX.DAT file into
    a GIF file.
  b) It can also use a GIF file as input and change background in F1CTXX.DAT
    file. It must be a non-interlaced GIF87 file.
    The input GIF file _MUST_ have this resolution: 512 x 8 pixels!
    This routine is not capable of resampling GIFs of other sizes into these
    dimensions.
    This version is now capable of computing checksums of F1GP files
    thanx to John Slade, john@grandprix1.com

2. Usage
	BACKGRND.EXE [-x] -d dat_file -b gif_file
  Parameters:
	-b	specifies GIF filename		(e.g. MY.GIF)
		path can be also specified
	-d	specifies F1GP track filename	(e.g. F1CT01.DAT)
		path can be also specified
	-x	this means EXTRACT -> extracts background from F1CTXX.DAT file
		into the specified GIF

  e.g.	1. puts brazil.gif into f1ct02.dat
	
	   BACKGRND.EXE -d c:\games\f1\f1ct02.dat -b brazil.gif
	
	2. extracts background from f1ct09.dat into germany.gif

	   BACKGRND.EXE -x -d c:\games\f1\f1ct09.dat -b germany.gif

3. Files
	BACKGRND.EXE	background changer
	README.TXT	this file
	F1PAL.PAL	F1GP palette file (for those who know...)
	other GIFs are just outputs from this programm are not necessary to run
	this programm.

4. Please feel free to ask questions and report bugs to my e-mail
   david.rehor@worldonline.cz

GIF/LZW is licensed under several patents
(but is still the best 8bit image file format)
