Hi, sorry for the terse answer, but am a bit rushed here, hope this helps
RAR is a type of compression similar to ZIP, you will need a program like WinRAR to open them
http://www.rarlab.com/
I am guessing here that the ".r01" ".r02" etc are similar to winzip's multi-floppy spanning feature.
SFV stands for Simple File Verification, its is basically a mathematical short checksum number based on the original file. ie a poor mans MD5 hash.
http://www.wotsit.org/ is a reasonable place to start looking up what file extensions mean
EDIT
dealing with my other chat windows meant most of this is was not necessary,oh well,c'est la vie.