that sfv file that your are talking about doesn't have to be burned, its only for checking if the checksums are right.
In that file you find a Bin and a cue file thats the one to be used for cdr win.
I downloaded an ISO in the rar format with a bin file (about 750 MB) in it and there is one sfv file. How do I burn the contents of the bin file to a CD.
Try CDRWin or you can the use the BIN chunker in Fireburner.