How to Setup Multiple Boot Sequences for Different PS3 Resolutions
The yaboot.conf file is able to boot different resolutions when you configure it the right way. It is very handy when you own an SDTV and run it in 480i and then go to your friend's house who has an HDTV and want to run it in 720p. I think this will work for YDL 5 and 6, but this is for the people that run YDL 6.
1) Open up a terminal and open up the yaboot.conf file:
Note: DO NOT copy and paste this and put it in your file! On my install I did not accept the default options for the partition table which for some reason changes the yaboot.conf meaning that mine is different from everybody elses. So just copy and paste your own text.
Save, reboot, and if you did it right, at the kboot prompt, you can tab through the options you have just made for the different resolutions.