questions

I have a firmware modified xbox 360 (lite-on). However due to the fact that no wave 4-6 booting iextreme exists i had to modify the wave. This will definately get me banned of xbox live so i do not connect to the internet.
1)I was wondering why my xbox 360 does not play avi files any more.
2)I was also wondering that now that microsoft has released thier usb support , could i boot torrented dlc off the usb drive. Because i do not want to jtag my xbox
3)I was wondering how i could burn original xbox games such as GTA SA when i poccess the iso file.
4)I was wondering if any decent service exists to play online (non Xbox live) and if it does exist is there any way to shield my xbox 360 from microsoft while playing on this service so that i do not get banned off xbox live.
5) I was wondering if anyone had any news on a iextreme firmware for lite on drives which will boot all current waves
Thank you in advance
zainie