Bring up the options dialog from the button described above (shows when hovering the raid or group window).
You put in commands just like you could type in-game, but without the slashes.
Click edit next to Button 1 and use this code to assist:
assist SELECTED
Click edit next to Button 2 and use this code for Lay On Hands (if that's what the ability name is:
useabilityonplayer SELECTED Lay On Hands
Read this guide for detailed information on the Quick Cast/Cure buttons:
http://www.eq2interface.com/forums/s...ad.php?t=13801
Cheers, hope that helps.