Okay, I'm new to this forum, so first, hello to all. 
I've recently bought GTASA for my PC.  I've downloaded the Bigfoot skin by Bigleos 
I went to replace the .txd file.  But I don't have one.  I did the full install but none of the auto's .txd's are there.   
It's also says in the read me to open the IMG tool or ultimate editor.  I don't know what that is. 
I did download from the tools section a SA mod installer.  But when I tried to do that, it said that that mod 
is not compatible with the mod installer. 
What can I do to make this work? 
Thanks 
never mind, I guess I should do some searching before asking you guys. 
I found the Img tool and found the monsterb.txd, I backed it up and replaced it. 
Right? 
Thanks 
okay so now I've figured out how to do it all but it freezes up when the game tries to load. 
I backup the file put in the new one.  It freezes.  I go back delete the new file reinstall the backup and it still freezes.  What is going on?  What am I doing wrong? 
I've reinstalled the game 3 times now. 
Is there a trick to doing this.   
Here is exactly what I'm doing  
I open the IMG tool.  Open the GTA3 files find the monsterb.txd extract it to my docs, rename it as backup  
add the new file that I downloaded monsterb.txd.  try to play and it freezes. I go back to IMG tool. Delete the new one and bring the backup in.  Still freezes.  Then I save the player.img and reinstall the game 
HELP