.rar is a compresion file similar to the better know .zip that is now included in windows.
Extract Now is a free programme that will open the .rar archive.
http://nmoin.brinkster.net/en/
Hope that helps?
PS: Thanks for the link that's great.
Basically, a bottleg is a recording not officially released by the band rather than not officialy recorded, as radio / TV / INternet broadcasts can also count as bootlegs.
As for where to get them... I don't know where to start.
There's trading with other users.
Downloading from the hub...
For those that don't know the band Dream Theater - who are known for covering entire albums in their live shows, including "Number..." - started a record label - YtseJam Records - earlier this year so they could release "Official bootlegs" along side their regular releases
Aside from the...
Ha, that's interesting, especially as Metallica were in Philly on that date?
(There's a set list on the MetLive.com site if you want to check.) with the Chicago show being several days earlier.
Wonder if all the songs came from the same tour?
Still, that's bootlegers for you. :o