New Xbox 360! Questions!

[espett]

Hi,

Yesterday I bought a modded 360 from a friend and I have some questions.  The mod was done professionally and my friends games were burned by someone else for him as well.  I have been reading a bunch of forums but still have some questions.

1.  Is there anyway I can find out how exactly it was modded?
2.  What is the easiest way to back up my games, and is there anyway to do it with a  Mac?
3.  Are backup games more prone to scratching or breaking than official games?
4.  The 360 has never been on Live, is there anything I can do to prevent it from getting banned?
5.  Do I need to update the firmware for the mod or anything as new software comes out?
6.  Do the intercoolers that you can buy really work, and are they necessary?
7.  Is 1080i or 720p better or does it depend on game?
8.  On the back of my TV there is one yellow RCA cord from the Xbox 360 that doesn't seem to go in any ports, if I am using a HDTV am I only supposed to use 3 of the cables or all 6?

Sorry for all the questions, and thanks in advance for some answers.

-Eric

[Arakon]

just about every single of those questions has been answered already, some about 20 times too.
as for 8, it's a combo cable. if you use hdtv, there's no need for the yellow connector.

[espett]

I have been searching but I can't find it all...Any help is MUCH appreciated