Firmware Downgrade

I dealt with the issue of firmware update or receiver update n another blog. I am interested now in writing about the downgrading of receiver firmwares. I never really thought that I would be interested in the above topic until I got a new receiver recently.
I deal extensively with Strong receivers, because they are the most obvious receivers in this part of the world. In those days, it used to Supermax. I have heard of several other models that are also very popular around here, but Strong is still the most popular. Perhaps, this may stem from the fact that many pay tv organizations are using Strong boxes for their services.
I recently got a SRT-4669XII. The software in it was 102p. So, I felt I should update it to the latest release which is 109p(April 14th). I went to strong website, under downloads, I saw software, looked for the receiver and downloaded and installed it.
I had to reverse this update(downgrade) days later when I discovered that though the new firmware had the Picture-in-Picture option and other cool stuff, it did not enable the HE-ACC sound format in which some channels were broadcasting.
I searched frantically on the net for a downgrade. I saw one on a website I have never seen on any forum or blog. I downloaded the 103p software which is lower than what I had. I installed it and gbam! i had the audio I was looking for.
The procedure for downgrading Strong receivers is the same as updating.

1. Get the firmware from either Crosat.com or Wizkid.persiangig.com
2. Save it after download in your USB device
3. Plug the USB and go to menu, then usb, press enter on data transfer and click on upload file.
4. It is that simple.

The first person that told me about firmware update wanted to do it for me at a fee, but you can do it on your own. In case you do find the firmware you are looking for in the two sites above, you  can tell me by dropping a comment and I will tell you the name of the site where I eventually got mine.