I've had quite a few private messages sent to me over the past few weeks asking me how to perform the DVD region hack on the Sony BDP-S350/S550 using a Nokia N95. I know VindalooJim has put a link to my original forum post at the start of the 'Bike' thread but I didn't really go into much detail there which may be why some people are having trouble with the hack.
To save anybody else any bother, I'll post the method I used, in detail, here:
Firstly, download the ZIP folder containing the CCF file from AVForums (I'm not sure if this is still available to download so maybe someone could point in the right direction) and upload it to the Psiloc irRemote website when prompted at the start of the wizard (It's the file called 'BDP-S350.ccf' in the extracted folder). On the next page there'll be a list of buttons you can assign. Use the drop down list on any five of them and select 'S350.1.?', 'S350.2.?', 'S350.3.?', 'S350.4.?' and 'S350.5.?'. It doesn't matter which buttons you assign them to as long as you press them in numerical order when it comes to doing the hack. So you could pick 'Forward' for 'S350.1.?', 'Pause' for 'S350.2.?', 'Play' for 'S350.3.?', 'Rewind' for 'S350.4.?' and 'Stop' for 'S350.5.?'.
On the next page it will ask you for the device IMEI (ignore that), your nickname (enter anything) and the device name (put Sony BDP-S350). Click 'Finish' and it will be uploaded. With the software installed on your phone, run it and download the buttons assignments you have just uploaded by searching for 'Sony BDP-S350'. Download it to your phone and the main remote screen should come up. Point the IR port of your phone closely towards that of the Blu-ray player (with it turned on and no disc inside) and press the buttons you have assigned in the right order. In the above example, it would be 'Forward', 'Pause', 'Play', 'Rewind' and 'Stop'. Make sure you do it fairly quick though or it won't work. If the 24p light starts flashing it has worked so turn the player off, turn it back on and it should be region free.
As a side note, it'll probably be beneficial if somebody who uses this method posts the nickname they used when they uploaded the CCF file and the buttons they assigned to this thread which would save anybody else having to upload the file. I know I could do it but I'm feeling very lazy...