I think this is a very interesting and really heavily protected game…I tried to backup Frontline Attack (italian version, SecuROM ver. 4.77.00 0004) with/without twin sectors and using mds (converted in BWA) /BWA files and also the twinpeak method but when I burn the tweaked image via Blindwrite or CloneCD, the obtained cd doesn’t pass the protection control (when I start the game). I can only start the game via alcohol’s emulation (and it takes approx 15 secs.!) This is a very hard game to backup on a cd, and the twinpeak trick (in any of its form) doesn’t seem to work with!
The Data Physical Measurement was very good as you can see from the graph below, so these coasters are not causated by a bad measurement of linear density of sectors.
I think this is a very interesting case and need further investigation !