Tiino-X83

Hello, I have a radio AVH-P2300DVD Pioneer, and I would like to know some information. 1 / I wonder if it was possible to update the software/firmware of the radio? (On the Pioneer website I find no information about it) 2 / If no update is available if it was possible to install a custom firmware (unofficial update)? Thank you (Excuse me for my english I'm french)