There are a number of ways of changing key behavior in HKN on the fly.

HKN allows you to use scrolllock, capslock and numlock as toggles (This is the way I do it)

For example

Code:
<Hotkey scrollockon F1> 
<sendPC local> 
<sendWin wow1> 
<key F1> 
<Hotkey scrolllockoff F1> 
<sendPC local> 
<sendWin wow1> 
<key CTRL F1>
so if scrollock is on, then key F1 is passed to wow1, if it is off then key CTRL-F1 is passed. you have F1 as a heal and CTRL F1 as dps (Just an example)

I actually use it for a few things, capslock on means my priest joins dps, scrolllockon means only use shadow spells

I have had a disagreement with one of the mods and my accounts keep getting banned......I may get bored of opening new accounts/using proxies etc......so if you want HKN support then you might want to PM Freddie, who is VERY supportive and happy to answer questions (www.hotkeynet.com)