in gmax if i have say 5 vertex's on my box ans i want it to come into a sharp edge can i delete the middle three and then move the outide ones together and still have it work ok? or do i have to adjust all of em into the same spot?

Nope, if you remove a vertex somewhere in the middle, you'll rather have a hole there.

The vertices are the coordinates, through which the edges go. Better arrange them, to the shape you want

ah ok thanks i thought that may be the case. lots of moving around for me then lol

Are you trying to make the point of a ship?

yeah the sides of the ship i'm playing with come into knife like edges.

as seen below

http://members.optusnet.com.au/jampat/pictures/sabaothdestroyer.jpeg

Nice ship

To make the the side of the ship you could make a box, extrude the side and then non uniformely scale the new face.