[Keeps extracting iso files into .r00, .r01, r02...]

Don't want to waste another DVD, so I thought it be best to ask.

 

Anyway, I want to burn an Wii game iso to a DVD. (My Wii has been softmodded correctly and is also a 2006 Wii - It can read burned DVD's)

 

So as title reads, It extracts the iso into smaller files named .r00 and keeps going until .r42.

Where is the option so I can uncheck this option?

 

Thanks in advance