Excel to gcode

Hi All,
I've got it working with TOM's tip.
Just in case someone is interested here is how I did.
get the x,y,z points, the part should be drawn as it is going to be
machined using the 4 axis(on a vertical plane) and perpendicular to
the y axis(or along the x axis.) zero plane should be at the center of
the part.
first convert x and y points using =ATAN(C:C/B:B)/(PI()/180)
then get the result and do =SE(B:B<=0;N:N+90;N:N-90) gets the angle
for "A" axis( use "IF" in English not "SE")
now do the Z axis =RAIZ((B:B*B:B)+(C:C*C:C)) ( you should
change "RAIZ" for your language)
then fill up a new page with x,y,z,a axis

There you have it.
It should work nice when single point engraving on a oval shaped stock.
Thank's for the tip TOM.
What's next? getting a visual basic program to do it.

Fogassa.