[Trinket]

Thank you! I have it fully working as I wanted it to.
I implemented the scripts to be called upon screensaver start|stop and when XBMC gets closed. It seems to be working flawlessly.
It seemed I had a mistake in the addon.xml file which I corrected when moving it to /usr/home/share, when I moved it back to /home/xbian as you told it kept working.
The final script is:
http://pastebin.com/2mCLmAeB

PHP Code:

import xbmc
import subprocess,os
class Screensaver(xbmc.Monitor) :
        print("[CUSTOM SCRIPT]Checking PlayBackState")
        def __init__ (self):
                xbmc.Monitor.__init__(self)

        def onScreensaverDeactivated(self):
                print("[CUSTOM SCRIPT]XBMC in use")
                os.system("sudo python /home/xbian/.xbmc/addons/service.procmanager/resources/stopall.py") #Calls another script to stop proc

        def onScreensaverActivated(self):
                print("[CUSTOM SCRIPT]XBMC in Standby")
                os.system("sudo python /home/xbian/.xbmc/addons/service.procmanager/resources/startall.py") #Calls another script to start proc

        def onAbortRequested(self):
                print("[CUSTOM SCRIPT]XBMC is closing")
                os.system("sudo python /home/xbian/.xbmc/addons/service.procmanager/resources/startall.py") #Makes sure processes are running if xbmc gets closed

print("[CUSTOM SCRIPT]**Working**")

monitor=Screensaver()

while not xbmc.abortRequested: #End if XBMC closes
        xbmc.sleep(5000) #Repeat (ms)