1) copy Pysl.app under /Applications/
2) Set autorization of Pysl.app and sub directory and files to 755
3) Create directory named Pysl under /Library
4) copy PyslSystemLib.dylib in
5) make a backup of com.apple.SpringBoard.plist file in /System/Library/LaunchDaemons/
6) open (with text editor) com.apple.SpringBoard.plist in /System/Library/LaunchDaemons/ and add path below
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict>
<key>EnvironmentVariables</key><dict>
<key>DYLD_INSERT_LIBRARIES</key> <string>Library/Pysl/PyslSystemLib.dylib</string></dict> <key>KeepAlive</key>
...
or if you have already key DYLD_INSERT_LIBRARIES: (Dock/WinterBoard/Cydia...)
<key>EnvironmentVariables</key>
<dict> <key>DYLD_INSERT_LIBRARIES</key> <string>/Applications/WinterBoard.app/WinterBoard.dylib :/Library/Pysl/PyslSystemLib.dylib</string></dict>
<key>KeepAlive</key>
...
7) reboot your iphone
8) Be cool and enjoy !