-If you're having trouble, read the bottom of the description.- !!!WARNING!!!: it is very easy to corrupt your game files if you do not follow steps exactly. This tutorial is now fairly old as well. ATTEMPT AT YOUR OWN RISK. I recommend you backup your files before attempting to modify your game. 3DOWNLOAD LINKS: It appears the website to download the mod tools has went down. I cannot at this time provide new links as I don't have the ability to test them. Be skeptical of were you download these tools as to not download a virus. You can begin your search by searching for: gta-iv-asi-loader-v1020b-f1976 left-4-liberty-infection-v51-f17152 the other link seems to work. http://www.gta4-mods.com/script/left-... http://www.gta4-mods.com/tools/gta-iv... http://www.gtavision.com/index.php?se... CONTROLS BY DEFAULT: Toggle Script=F7 Toggle Zombie Night Script=F4 Toggle Breaking Down Cars=L Remove Existing Survivors=Y Search For Survivors=B Spawn Single Survivor=N Heal Player / Inspect Ambulance For Antivirus=O Toggle Zombie Animation=I //also toggles between 'running" infected and 'slow' infected during 'Zombies at Night' Toggle Running And Slow Zombies Animation=U Toggle Radio=T Fast Forward Time One Hour=J Disable RADAR=M Toggle Helicopter Attacks=H Randomize Weather=Insert Toggle Pedestrian Events=PAGEDOWN Toggle World Fires=PAGEUP Toggle Zombies With Peds Or All Zombies=Delete Enable Survivor Invinciblity=F8 Enable Fuel System=F9 Vehicle Speed And Health=F10 Display Infection Percentage=F11 Display Health and Armor Percentage=F12 If problems persist, download below links Do you have c++ 2000 redistributable installed? Get it here: http://www.microsoft.com/downloads/de... Do you have .net framework 4 installed? Get it here: http://www.microsoft.com/downloads/de... You can also try: http://www.microsoft.com/en-us/downlo... IF ALL ELSE FAILS: install LCPDFR mod. It will add all the files you need to stop crashing etc. and any files it doesn't add, it will tell you to downlaod them.