Sustainiac is the *** mans Fernandes
Robb, If you want the toggle switches where Vai's are (the most common spot) you will have to get the chipboard routed from the back of your guitar (even though you have a pickguard) if you do that then you will have a hard time adjusting the trim pots on the back (which is a must). and one of the battery wires connects to the output jack and they are only about 3 inches long so they need to be on the back of the guitar right after the trem springs.
You could have the toggle switches on the pickguard but you might bump them. that way you can have the chipboard right under the pickguard and no holes in the body.