I guess I'm not sure why, if the problem is that I'm using an older build of FS2 Open, the game worked up to this point (this point being the "To Hell and Back" mission in Raider Wars). I switched back to using a debug build to try and run the mission, and this is a script dump that resulted. Hope I'm not testing anyone's patience here.
=================== STARTING LEVEL LOAD ==================
Someone passed an extension to bm_load for file 'rw071024.tga'
ANI 2_Loading.ani with size 43x43 (32.8% wasted)
Loading rw071024.tga for the first time.
Loading TMP824x43+16 for the first time.
Starting model page in...
Beginning level bitmap paging...
BMPMAN: Found EFF (particlesmoke01.eff) with 52 frames at 28 fps.
BMPMAN: Found EFF (particlesmoke02.eff) with 52 frames at 28 fps.
cf_get_file_list_preallocated looking for type=7, filter="*-fbl.tbm"
BMPMAN: Found EFF (JumpIn01.eff) with 61 frames at 22 fps.
BMPMAN: Found EFF (JumpOut02.eff) with 61 frames at 22 fps.
loading warp modelLoading model 'warp.pof'
IBX: Found a good IBX to read for 'warp.pof'.
IBX-DEBUG => POF checksum: 4091475956, IBX checksum: 3198548781 -- "warp.pof"
128
BMPMAN: Found EFF (shieldhit01a.eff) with 23 frames at 21 fps.
SHOCKWAVE => Loading default shockwave model...
Loading model 'shockwave.pof'
IBX: Found a good IBX to read for 'shockwave.pof'.
IBX-DEBUG => POF checksum: 3254423745, IBX checksum: 2576995994 -- "shockwave.pof"
SHOCKWAVE => Default model load: SUCCEEDED!!
Loading rw071024.tga for the first time.
Loading TMP824x43+16 for the first time.
Loading TMP128x128+8 for the first time.
MISSION LOAD: 'rw07 - hab.fs2'
Hmmm... Extension passed to mission_load...
Using alternate ship type name : Unknown
Loading model 'hyperion.pof'
IBX: Found a good IBX to read for 'hyperion.pof'.
IBX-DEBUG => POF checksum: 232720457, IBX checksum: 4192824690 -- "hyperion.pof"
BMPMAN: Found EFF (ea-debris01-glow.eff) with 210 frames at 30 fps.
Warning: Ignoring unrecognized subsystem reactor01a, believed to be in ship hyperion.pof
Warning: Ignoring unrecognized subsystem reactor02a, believed to be in ship hyperion.pof
Warning: Ignoring unrecognized subsystem reactor03a, believed to be in ship hyperion.pof
Warning: Ignoring unrecognized subsystem reactor04a, believed to be in ship hyperion.pof
Warning: Ignoring unrecognized subsystem fighterbay, believed to be in ship hyperion.pof
Loading model 'aurora.pof'
IBX: Found a good IBX to read for 'aurora.pof'.
IBX-DEBUG => POF checksum: 1011684148, IBX checksum: 2882615696 -- "aurora.pof"
Starting mission message count : 196
Ending mission message count : 232
Current soundtrack set to -1 in event_music_reset_choices