What are you trying to do?
Simplest would be:
/bind <key> "powexecname hover$$powexecname fly"
First press switches on fly 2nd press swaps to hover, and back again on next press. I combine it with:
/bind <key> "powexectoggleoff hover$$powexectoggleoff fly"
Which switches both off. You could add a powexectoggleon sprint, to the end of the above too, but I tend not to.
here's a bind i use now on pretty much all my fly chars.
/bind button5 "powexec_name Hover$$powexec_toggleon toggle X$$...$$powexec_toggleon Toggle 1"
That bind will toggle on as many toggles you like (Sapphic Neko has 6 on one button) starting with the toggle you put in last. Once all toggles are on, the button will toggle on or off hover.
i then bind fly to button4 on mouse and thus have easy reach to travel. This way i don't need a specific button to kill toggles.
Just my personal preference.
Also, don't forget your 4 Fly Poses for fun!
(Something like: /bind <key> "e flypose1")
The nice people around here might have a better idea, but you get the picture - the poses are fun and although they don't actually make you fly any faster, sometimes it can look as though you are 
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here's a bind i use now on pretty much all my fly chars.
/bind button5 "powexec_name Hover$$powexec_toggleon toggle X$$...$$powexec_toggleon Toggle 1"
That bind will toggle on as many toggles you like (Sapphic Neko has 6 on one button) starting with the toggle you put in last. Once all toggles are on, the button will toggle on or off hover.
i then bind fly to button4 on mouse and thus have easy reach to travel. This way i don't need a specific button to kill toggles.
Just my personal preference.
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This is exactly what I do on all of my characters, regardless of their travel power (if not a Hover/Fly switch then I'll make the bind switch CJ/SJ, or toggle on/off Superspeed) - it is bound to the F key on all of my characters (except my mastermind, who is a teleporter, and has pet commands bound to F and other nearby keys), which makes re-toggling and switching between travel/combat really fast, easy and instinctive.
/bind numpad8 Say Lets Zoom!$$e flypose1$$e flypose2$$e flypose3$$e flypose4$$powexec_toggleON fly$$autorun 1
Is the fly pose one I use.
As a further aside, this is useful for easy TPing (left shift and left mouse button to use TP):
/bind lshift+lbutton "powexec_name Teleport"
You can try this:
/macro Fly "$$e flypose4$$e flypose3$$e flypose2$$e flypose1$$autorun 1$$powexectoggleON Fly"
It will create a new button for you, and each time you press it, your toon will change from a flying pose to another one.
For Peacebringers, this macro ends with "Energy Flight" instead of "Fly".
I hope it's useful for you.
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Anyone know of a hover/fly bind.
I found one on the US forums but I couldn't figure out how to apply it.
Clicky!
On this post its the 4th post down. By Meraxes
Any help will be greatly appreciated.