Someone has used GPAD tool contained in the sdk?

I need help with this tool:

(GPAD is a developer graphic tool for debug games in real time)

I'm on DEX 3.55 itskamel and in PC I have SDK 3.70 - proDG tool 4.20
For run GPAD tool I need Target manager running on my pc connected to the LAN, when I run the game (COD3) in system software GPAD can't capture the frame. (I don't know how to run games in the debugging option).

my questions are:

someone in this forum has successfully used this tool?
I need a decrypted eboot or *.self for this?
how I can run games in the "debug mode" of the ps3?

Here more info of GPAD: