I've gotten Tie Fighter: The Collectors Series edition to run in hi-res mode and full sound up to a point. After flying about 5 or 6 battles, when I exit the mission, the game is stuck at the screen with the officer waiting to debrief you. Task Manager shows the system maxed out at 100%. The game settings are all set for the highest graphics. Which game settings do you recommend to disable first to ease the load? Running at low-res is at the bottom of the list. Before I start tweaking Dosbox's config again, I want to try easing the game back, without loosing my hi-res screen.

Specs:
Pentium IV 2.53 Ghz
1GB Ram
ATI Radeon 8500 AIW 64Mb
DosBox .63
D-Fend Frontend

I haven't included my config, because the game runs fine otherwise. I'm pretty sure it's just my game settings that are maxing out the system resources.