combining bin files

someone uploaded a copy of lunar eternal blue on my ftp..which is cool..thanks to the guys that are uploading and downloading..but my question is do i use these i need to combine them, and if so how...the file types are like lunar2-bin.r00...lunar2-bin.r01..and such..if you guys could help me would be much appreciated
If the file extensions are *.rar, *.r00 *.r01 etc. it's a multipart RAR archive. Open the first file in the set and extract. (Depending on the RAR version, this is either *.rar or *.r00.)