Libraries - win / linux

Hi,
There are a few extra libraries that i want to add to my Arduino Dev Kit but the instructions provided are for mac and the folder structure is not the same for Windows. Where would i put. for example, the ps2 library from Arduino Playground - Ps2mouse
it says to extract to the hardware/libraries directory, which doesn't exist in Win x. What is the windows directroy?
Sorry if this has been stated some where else, i had a good look but couldn'e find it.
Thanks

Hi,
the directory structure is the same on linux and windows. But the structure had been altered with the transition from release 9 (I think) to 10.
If you installed a recent version (11) of the IDE on both OS all additional libs go into :
DirWhereYouInstalledArduinoIDE/arduino-0011/hardware/libraries
Eberhard