Too many annoying windows! How to i make it use the same one??

["Trevor C. Pankonien" <tcpankon@gmail.com>]

I've been looking through every config file i can imagine and I've
gotten nothing.  Is there any way to make debian open a folder inside
the same window, instead of opening a new window each time? it gets to
be kind of annoying when you are looking for a file nested 6 or 7 layers
down, and all of a sudden there are windows everywhere.  Thanks in
advance
Trevor
tcpankon@gmail.com