Sounds similar to a game I own except slightly different. Game freezes at the exact same spot every time yet background music plays no problem.
Are you using good quality media? (Verbatim, Sony, Taiyo Yuden, etc)
Could be a bad burn (Sort of.). Or a bad DVD backup from the original disc.
PS3 Model - 80 GB/Non PS2-BC
PS3 Version - CECHL01
Modification(s) - Official Firmware 4.00
Purchased - March 27th, 2009
PS2 Model - Slimline/SCPH-77001
PS2 Version - V15
Modification(s) - UlaunchElf 4.42/Free MC Boot 1.8b
Purchased - April 16, 2007