Assigning hotkeys with maxscript to rotate proxy

Hi all, i'm using this script to place VrayProxies (shown underneath). By pushing the Place button, the selected proxy will follow the cursor in order to place it anywhere in the scene. I like to add a two hotkeys to be able to rotate the proxy while it still follows my cursor. So i'm looking for a way that allows me to assign the left and right arrow key as hotkeys to rotate the proxy 5 degrees left and right on the z-axis. Is this possible? Thank you.

I understand i can assign them manually ofc but i like to do it with maxscript so the rest of the office can use it too and they don't have to set up those hotkeys manually themselves :)

button btn_place "" height:29 width:29 iconName:@"W:\Algemeen\Werknemers\Remy\Icons\Workflow toolbar\Aankleding - place.jpg" iconSize:[29,29] tooltip:"Place your selected object" offset:[0,-5] across:4

tool selectionMover numPoints:1

(

local lastoffset

local prevCenter = selection.center

on freeMove do

(

if lastoffset != undefined do selection.center -= lastoffset

offset = (gridPoint - prevCenter) * [1,1,0] + [ 0, 0, 0 ]

selection.center += offset

lastoffset = offset

)

)

on btn_place pressed do

(

if selection.count != 0 do startTool selectionMover

)