Hi Axiom,
If you launch Sonar and go to options/keybindings
On the left hand side is a list of key combinations. I'd scroll through there and look for CTRL+f4, CTRL+f6, CTRL+tab. When you highlight these it should say somewhere on the screen what the function is. It also might say [unassigned]. But since they do something in Sonar it should just show you what the function is called in Sonar Lingo.
Then you should see if that function shows up in the list in Tools/Frontier TranzPort.
If it doesn't then it's possible through keybindings to assign these functions a different key binding (other than CTRL+f4 etc) that is compatible with Tools/Frontier TranzPort's list.
For example, whatever is assigned to CTRL+f4 in keybindings you can change to shift+f4 and then go into Tools/Frontier TranzPort and program a button to act as 'shift+f4' since it's already on the list.
I hope this makes sense. Let me know if you run into any sort of trouble but it sounds like you may get what you need by manipulating these two windows. I have an older version of Sonar here so when I looked for CTRL+f4 etc. they all said [unassigned].
CS