Thanks guys for your help, I actually found some advice from this website
http://forums.macrumors.com/showthread.php?t=101628
Success!
Here is the content below from the site, tricky to find if your a novice like me!;
Indeed there is.
1.First connect the DVI cable, so the Powerbook switches to multiple display.
2. Launch system preferences>display
3. There should now be 3 tabs on the top (Display, Arrangement,Color). Select the 'Arrangement' tab.
4. Check the 'Mirror Displays' box. The Powerbook display will reset to mirror mode.
5. When the display settles, pull out the dvi cable, let it settle and plug it in again.
6. You should now see two dialogs, Color LCD and NTSC/PAL.
7. Select the resolution you want on the Color LCD dialog.
8. Select to bring to front the NTSC/PAL dialog and you will see the Refresh rate drop down list available for 50 Hertz(PAL) selection.
Looks quite bothersome but works for me. Was trying to record game session on a PAL camcorder and stumbled on your discussion while looking for solutions, found it while meddling the Preferences. Thought I'd share it even though it's been some time. Happy New Year.