A couple of years ago I made this amazingly useful project called the SUPER PROBE designed by Luhan Monat
. The web page is athttp://mondo-technology.com/super.html
The version seems to have changed a bit as on today but most of it looks the same.
It is an amazing device with 18 very useful tools in one unit.
I chose to make a single sided pcb for it using Protel 99 and later exported it to AD.
The AD design has been attached along with the gerbers.
Please note that some connections have not been routed and you will have to solder jumper wires in place of those.
The PCB is too big to be used as a pen type probe but can be housed in a box instead.
P.S. The above mentioned site has many other useful PIC projects.