Thank you Kari. That's what i was looking for.
In fact i was already reading here some threads like that and as i thought it's not as easy as to drag n drop the folders. I really don't understand how doesn't windows as this option on install.
Anyway, since i already installed to many programs that need access to those folders on c: i think i'll just delete d: and continue to work on c: ...isn't this a good option? If it is can someone please point me the way on how to do this please? do i need to start a new thread with this question?