No point in using it really.....
when your compter is idel it doesnt heat the room up anyways..... When it is in full load, it may. the software coolers do not help you at all when the computer is in full load, only when it is ideal. they suspend part of the computer thus less heat is given off...
Now if you think it will help an overclock buy creating less heat, that is a joke. Like i said before at full load it doesnt do anything, so thier is not point in running it... the only reason to run a software cooler would be to save battery life on a laptop, but i am sure that is not the case as you have a duron.