There's no client hak I know of that gives you more quickslots - one person on the BioBoards recommends getting yourself
one of these and programming the macros appropriately, but that may be more money than you're willing to spend for 54 extra slots.
There is no way to combine spells into a single quick slot, according to Bioware. There are ways to do it with sequencer items, but that involves module alterations.
You might want to try
Auto Hot Key. I'm not sure I'd trust a life-or-death spell macro to click-and-drag macro commands, but if you were creative you could probably replace some non-combat spells/skills with key-combo commands.
Cheers!