WolfPack Counter-Strike: Source Map Pack Installation Guide
DO NOT USE WIN RAR - follow the instructions from this document and you will be fine -
If you use WinRar and do not follow these instructions do not bother asking for help.
Steps
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Download all the files for the map pack you wish to install from the
map packs page
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Rename all the file extentions to ‘.exe’; For example if the file your downloading is named
‘WolfPackRatsMapPackv1_2Part1of7.zip’ rename the file to ‘WolfPackRatsMapPackv1_2Part1of7.exe’
(the following icon should appear 
)
What if you cannot see the file extension?
- Virus/Malware/Spyware Scan the file
Caution: Always check any files you download from the internet for Virus/Malware/Spyware especially EXE files
- If the file has passed your scans - then run the EXE file(double click the file - this may take a while depending on your computer)
- Click the ‘...’ button
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Locate and select your ‘cstrike’ folder and click OK
(c:\Program Files\Steam\SteamApps\YourAccount\Counter-strike source\cstrike\)
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Click ‘Extract’
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If and when you will receive a prompt asking ‘Would you like to replace folders and files?’ Select ‘Yes to all’
- Perform these steps for each EXE file in the map pack.
- Installation complete
Troubleshoot
Cant see the file extension?
How to show file extensions