These are the steps I took for creating my router bit organizer (http://familywoodworking.org/forums/...-Bit-Organizer) in vCarve. I assume most of this should apply to some of the other Vectric products others are using here.
The setup of my board, which was 12" x 10" x 3/4", Zero for Z was set at the top of the work, and the datum point was set in the bottom left of the work piece.
I setup to snap to the grid, you can bring up this dialog by pressing F4
I first created a single circle vector with a radius of .28, which allows a little room so the 1/2" router bit doesn't get stuck. I wanted the holes to be 1" on center from one another, so started 1" off the left and bottom sides of the work.
I closed the circle vector window, then clicked on the "Create linear array of copies" button on the toolbar
I chose to create copies of the circle in 5 rows and 11 columns, I subtracted the diameter of a circle from 1" to get .44", which was used as the spacing between the copies.
Click Copy, then click Close.
Create another circle vector, this one was 1" above my other array on the left side, .125 radius (I found this was big enough for all my 1/4" bits).
Close the circle vector window and click the "Create linear array of copies", this time make only 4 rows, still 11 columns, but also update the spacing between copies to .75" (1" minus .25"), click to copy and close the array copy window.
Select all the vectors and create a new pocket operation. I set mine to use a 1/4" end mill, .625" deep, zero pocket allowance, and calculated the pocket gcode.