it would be impossible to know because GH4 isn't out yet! maybe, if you can put songs on gh3 (custom). It might work for gh4
No, but many songs are available for download, but don't expect them all to be free. This IS Microsoft after all.
72
Yes
Sure it does why wouldn't it
You don't, unless you hack your GH3 disc on a PC, and add them there.
There are two songs that are commonly referred to as 'impossible' songs on GH3. The most popular one is "Through Fire and Flames" and the other is "Devil Went Down to Georgia".
70, not including Boss Battles and Downloadable Content.
Guitar Hero 3 has no DLC, if you wanted to put new songs on it you'd have to hack it somehow which is illegal. The new Guitar Hero: World Tour has DLC though, you'll be able to download songs onto and play songs from your SD cards (they will probably let you download all the songs from the previous games).
Unfortunatley Not. Why dont u just get guitar hero 4
No, it is not possible. Downloadable Content was never supported for the PlayStation 2, and never will be. If you want to play Downloadable Content for Guitar Hero III, buy an Xbox 360 or a PlayStation 3.
There is one way which you can do. But only on xbox. You have to put in al cheats for the game which you can get in a fourm. Then you put them all on and fail any song on expert. Next put all cheats off and complete or fail any song. Add Coltyboy on XBL if you need any more help. this is a lie you can only build a bot i tried this and this person lied XD