The mod does still work with 10.5.6 you just have to change this
<key>Broadcom2046FamilyUSBBluetoothHCIController_37A</key> <dict> <key>CFBundleIdentifier</key> <string>com.apple.driver.BroadcomUSBBluetoothHCIController</string> <key>IOClass</key> <string>Broadcom2045FamilyUSBBluetoothHCIController</string> <key>IOProviderClass</key> <string>IOUSBDevice</string> <key>IOProviderMergeProperties</key> <dict> <key>ClassicMustNotSeize</key> <true/> </dict> <key>idProduct</key> <integer>33301</integer> <key>idVendor</key> <integer>1452</integer> </dict> to this
<key>Broadcom2046FamilyUSBBluetoothHCIController_37A</key> <dict> <key>CFBundleIdentifier</key> <string>com.apple.driver.BroadcomUSBBluetoothHCIController</string> <key>IOClass</key> <string>Broadcom2045FamilyUSBBluetoothHCIController</string> <key>IOProviderClass</key> <string>IOUSBDevice</string> <key>IOProviderMergeProperties</key> <dict> <key>ClassicMustNotSeize</key> <true/> </dict> <key>idProduct</key> <integer>46848</integer> <key>idVendor</key> <integer>2821</integer> </dict> 