I'd recommend editing the control files within OpenIV, removing anything used for RRight. (B button on Xbox) as well as RDown (A Button on Xbox) and RLeft (X button on Xbox), as well as all of the Dpad. You can then use XPadder to set X+B as modifiers for ELS and Radio for pursuits. I have tried many different configs, even deleted all of the bound keys for controller apart from movement, Screen rotation and enter/exit vehicle and tried to use all other buttons for either modifier and LSPDFR binds. However, LSPDFR does use A for starting/ canceling pulling someone over which cannot be changed. I wish there was an option to configure LSPDFR controller configs, or at least turn off the controller binds.