Unhappy Problems with Nimbizz and Google Voice for free calls

Greetings, I am a newbie who recently got the X10 mini which I love, but I have had days of troubles trying to get Nimbizz and Google Voice configured to make free calls. An awesome developer named "fishsticksfromguam" made this program called "Advanced GV Caller" which I purchased, and could not get to work. I followed all of his helpful instructions, but it still will not work properly. Is anyone else having these problems or can anyone give advice?

The errors I get are:
With A.GV Dialer: it says GV is calling my phone and either the phone call just doesn't go through, or it says that my GV number is not set for callbacks. Since GV does not have a callback number, I don't get it.

Nimbizz: either goes black and freezes and I have to restart my phone, or it says, Nimbizz is not responding, force quit?
Then when I sign back in, it shows that my Skype account under Nimbizz is offline, whereas just a minute before it was online and I was able to make calls.

Also, when Skype is working, I can call out, but I cannot get any incoming calls.

Or it says, Activity Phone (in process.com.android.phone) is not responding, force close.

My Gizmo5 account is set up properly and my Google Voice phone number has been verified by the developer himself. I sincerely recommend fishsticksfromguam's programs as he goes out of his way to help.

Below are the instructions that I have followed:

1. Login in Gizmo5 and under the "FORWARDING" tab, select the option
"Forward All Calls", and enter your gtalk email address, hit save and log out.

2. On my Desktop computer, I start the official Google Talk client.

3. Login to Google Voice and under Settings menu, I added a new Phone
with my Gizmo5 telephone number and I selected "GIZMO" as the phone
type.

4. Google will now attempt to call your Gizmo5 number to verify it.
Since you've forwarded ALL Gizmo5 calls to your gTalk, it will come in
on your Google Talk Client where you can now answer the call and verify it!
*** YOU HAVE NOW VERIFIED YOUR GIZMO5 NUMBER ***

5. Install Nimbuzz (or Fring) on your Android phone, and ensure your
Google Talk is set up properly to receive voice calls.

6. Install Google Voice Call Advanced, enter your Google Voice
Username & Password, and for the Callback number, enter your full
Gizmo5 callback number (ie. 17475551212), and select "GIZMO5" as the
phone type. Select "Use GV for all calls". Hit Apply.

*** You should now be able to make FREE phone calls using your Android Phone ***

The problem is, I can't! Any advice please?

BOUNTY OF AT LEAST $20 through Paypal if you can get this working properly!