look in game index f1 2012 already has 2 conversions done for it 1xdvd5 / 2xdvd5
http://fileforums.com/showthread.php?t=74084
errors you have ( 3 files, must split to equal 100..( progressbar) you cant have 0,50 x 3 times )
could go 0, 50 for first file, 0, 25 for second / third files > then equals 100 )