[WoW] Fishing Macro - Interact and cast

Hey guys,
Brand spankin new to multiboxing, and have a question. I'm using Ridosaw's fishing setup with VideoFX viewers and think this would work. How would you set it up? Looking to loot the bobber via interact w/mousover and then /cast fishing. Goal is to have interact go out on down press and cast go out on release. Sounds pretty simple but since interact with mouseover can't go into an in-game macro, I'm not sure if it'd work. Thanks!

[Wizeowel]

Mapped key set to "press and release" , if you make it 2 steps, then step 1 will be done on key down, and step 2 on key up.
step 1 action: Variable Keystroke Action
step 2 action: Named WoW Macro

Make sure you have the binding for Interact with Mouseover correctly set up in game and in ISBoxer Variable Keystroke.