If you have a previous version of rockbox installed and running, just extract the archive into your ipod's root folder. If not, follow the guide at
http://www.freemyipod.org/wiki/EmCORE_Installation
About the build I previously posted, it includes patches by Cástor Muñoz and Albert Barca. Here are the exact links of the patches:
Cástor Muñoz:
iPod Classic/6G: swap L-R audio channels (patch v2, it is now accepted)
http://www.rockbox.org/tracker/task/12519
iPod Classic/6G: holdswitch PMU polling crashes (patch v1, it is a workaround, a better solution should be found)
http://www.rockbox.org/tracker/task/12520
iPod Classic/6G: cpu freq scaling (patch v2)
http://www.rockbox.org/tracker/task/12521
iPod Classic/6G: charger detection (patch v1)
http://www.rockbox.org/tracker/task/12522
IPod Classic/6G: LCD sleep (patch v2, it is now accepted)
http://www.rockbox.org/tracker/task/12523
iPod Classic/6G: hardware click support (patch v1, it was already accepted when i compiled my build, providing the link for reference)
http://www.rockbox.org/tracker/task/12524
Albert Barca:
iPod Classic - limit volume to +6db (patch v1)
http://www.rockbox.org/tracker/task/12568
iPod Classic - battery capacity update (patch v1, it was already accepted when i compiled my build, providing the link for reference)
http://www.rockbox.org/tracker/task/12569
Thank you everyone for testing!