Thanks for the replies.

Tried setting these up over the weekend but I ran into a few problems (and then got sick so didn't feel like working on them):

1. I've set up my main bars (keys ` to = ) to switch for shift and ctrl
a) I can't seem to have paged actionbars with this set-up. Is that normal or have I used too many bars elsewhere?
b) I have a macro on my main to poly her focus on nomod or ctrl and then on the shift bar I have fireball (on my alt I have poly on shift), however it keeps returning a no target error when I hold shift down (so theoretically try to cast Fireball), any ideas?

2. I have another set of bars set-up to work off the numpad, with modifiers giving extra bars.
a) I can't bind Shift to the numpad keys, it binds to Home, Up etc. Is this just a keyboard thing?
b) I got around this by adding an alt bar (instead of a shift bar), but I can't seem to add any macros from my alt to it. Normal spells are no problem, but when I try and put a macro in it just highlights the button (or multiple buttons) but won't actually drop the macro in.

I have all of my buttons set up to actions, so not sure if I should play around with changing button types. Sorry, these are rather specific issues, but someone might know an answer.