(svn r1038) Feature: OpenTTD runs with the grf files of the DOS version

Please read the Readme for further information. There are some minor graphical glitches when you use the DOS files. E.g. the autorail button is a bit screwed up.

docs/Manual.txt

@@ -24,6 +24,7 @@ On BeOS, run ./configure and then use jam. There are a variaty of options you ca
 On Windows, insert your "Transport Tycoon Deluxe for Windows 95" disk. You can use a DOS version, but your graphics will be purple. NB: Even if your version of Transport Tycoon Deluxe ran on Windows 95, it may still be the DOS version. Then run the OpenTTD installer. 
 
 On UNIX platforms; decompress your OpenTTD archive, or otherwise run the installer. You should be left with an OpenTTD directory on your system. In this directory, make a subdirectory called 'data', and into this place the sample.cat file and all the .grf files from the install CD of 'Transport Tycoon Deluxe for Windows 95". 
+(Alternatively you can use the TTD GRF files from the DOS version: TRG1.GRF, TRGC.GRF, TRGH.GRF, TRGI.GRF, TRGT.GRF. Those filenames have to be uppercase to be detected correctly. A few minor graphical glitches with the DOS graphics remain. E.g. the autorail button in the rail toolbar doesn't look as nice as with the Windows graphics.)
 
 If you want MIDI music, copy the 'gm' folder from the original game directory/CD to the OpenTTD folder.
 

docs/OSX_where_did_the_package_go.txt

@@ -10,8 +10,8 @@ opntitle.dat
 signalsw.grf
 trkfoundw.grf
 
-THE WINDOWS GRF FILES ARE STILL NEEDED!
-they need to be inside a folder called "data" in the same folder as OpenTTD. Create it if you have none. It should contain:
+THE TTD GRF FILES ARE STILL NEEDED!
+They need to be inside a folder called "data" in the same folder as OpenTTD. Create it if you have none. It should contain:
 sample.cat
 trg1r.grf
 trgcr.grf
@@ -19,4 +19,6 @@ trghr.grf
 trgir.grf
 trgtr.grf
 
+(Alternatively you can use the TTD GRF files from the DOS version: TRG1.GRF, TRGC.GRF, TRGH.GRF, TRGI.GRF, TRGT.GRF. Those filenames have to be uppercase to be detected correctly. A few minor graphical glitches with the DOS graphics remain. E.g. the autorail button in the rail toolbar doesn't look as nice as with the Windows graphics.)
+
 You should also use the data folder to add any custom grf files if you like

docs/Readme_Mandrake_Linux.txt

@@ -31,14 +31,16 @@ You can undo changes to a file with
 
 3.) Required data files:
 
-Copy the following files from the WINDOWS version of Transport Tycoon Deluxe to openttd/data/
+Copy the following files from Transport Tycoon Deluxe to openttd/data/
   sample.cat
   trg1r.grf
   trgcr.grf
   trghr.grf
   trgir.grf
   trgtr.grf
-  
+
+(Alternatively you can use the TTD GRF files from the DOS version: TRG1.GRF, TRGC.GRF, TRGH.GRF, TRGI.GRF, TRGT.GRF. Those filenames have to be uppercase to be detected correctly. A few minor graphical glitches with the DOS graphics remain. E.g. the autorail button in the rail toolbar doesn't look as nice as with the Windows graphics.)
+
   
 4.) Compiling and running:
 

docs/Readme_Windows_MSVC6.0.txt

@@ -58,7 +58,7 @@ b) libraru files (the lib dir, D:\Program Files\Microsoft Visual Studio\VC98\Dir
 
 Step 4
 -----------------
-Copy the following files from the WINDOWS version of Transport Tycoon Deluxe to the data folder
+Copy the following files from Transport Tycoon Deluxe to the data folder
   sample.cat
   trg1r.grf
   trgcr.grf
@@ -66,7 +66,7 @@ Copy the following files from the WINDOWS version of Transport Tycoon Deluxe to
   trgir.grf
   trgtr.grf
 
-
+(Alternatively you can use the TTD GRF files from the DOS version: TRG1.GRF, TRGC.GRF, TRGH.GRF, TRGI.GRF, TRGT.GRF. Those filenames have to be uppercase to be detected correctly. A few minor graphical glitches with the DOS graphics remain. E.g. the autorail button in the rail toolbar doesn't look as nice as with the Windows graphics.)
 
 Step 5
 -----------------