Here are my instructions for getting the Arduino working on 
Windows..

 - install PD latest extended build
 - install latest FTDI driver
 - install Arduino IDE
 - change serial port for Arduino (Start Menu -> Control Panel ->
   System -> Hardware -> Device Manager -> Ports -> USB Serial Port ->
   Port Settings -> Advanced -> COM Port Number

   Change this to the lowest-numbered available port.. In my case
   I changed it to COM2

 - Load up the example pduino patch (modified), and see if analog 
   values start coming in. (may need to change the comport to match
   what you've changed it to in Control Panel)

-Dave