You need to sign into the wifi and then select 'music store', here there is a list of downloadable content for Guitar Hero.
You will need to pay with wii points, if you don't have any then you can obtain these by asking for a wii points card at your local game shop.
How much?
£10 will get you 1000 wii points, each song is worth around 200 wii points.
After you get your points card you need to select the wii shopping option on the home menu where you can add your points to your profile by filling in the code that comes with each card.
then you just need to go to your Guitar Hero music store and download your chosen songs.
you can download songs online and insert it to your guitar hero game. search how to download songs to guitar hero two.
You can't download songs.
no.. not at this time
No
you cant
No
nope
You can't.
Illegally, yes
No. How do you expect Guitar Hero to make any money off of download-able songs if people can just play their own?
No, Guitar Hero 3 has no DLC, if you wanted to put new songs on it you'd have to hack it somehow. The new Guitar Hero: World Tour will have 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). If you want more info on Guitar Hero: World Tour for Wii check out the Related Linksbelow.
you have to use a computer to do it