New BETA coming with screen requester
Only the RTG versions support Broken Sword (AGA would be too slow).
Make sure you never use compressed audio files with ScummVM (eg MP3) because they aren't supported.
Ratte came good, check out Curse of Monkey Island running on his 90Mhz 060 -> ScummVM RTG
BTW these are the game's original system requirements
Pentium 90 MHz processor
16 MB RAM
DirectX version 5.0 or higher