I would like to thanks for this feature.
For me is this working
MAIN Radeon9700M.monitor LEFT
Would place the other monitor on the left side. Needs a reboot.
I created this Layout.txt file and External Monitor gived on the Left side of PB and mouse flip changed to left side, before this change was on the right side.
OS :MOS 2.2 reg, MOS 1.4.5, Ubuntu 8.04, MACOSX Panther on MOLk
RAM :512MB-DDR266 Apacer
GFX :ATI-Radeon 9200 128MB
HDD :MAXTOR-160+80GB ATA133
TV :Pinnacle Studio PCTV
Powerbook G4 A1139, MOS3.18