I am using the Mach3 2010 Screenset v1.1.4, As it has a build in probing wizard.

Click image for larger version. 

Name:	Probing Wizzard.jpg 
Views:	6691 
Size:	432.2 KB 
ID:	8990

This take care of about 95% of the probing I need to do, the other 5% is done with other software outside of Mach3.