Yeah, unfortunately SuperUI mod is not going to work with that (has conflicting UI mods like "Customize any vehicle plus wardrobe color changer" and "SaintsHUD")
You may try to install standalone versions of some of included mods though (texture mods are generally safe)
EDIT: SuperUI for SRIV v1.2 released.
v1.2 (February 3, 2021)
* Disabled the ability to buy ammo for weapons with infinite ammo.
* You can now use cursor keys in Plastic Surgeon's body triangle screen to finetune your build.
* You can now exit to Main Menu by pushing Escape key during initial character lineup screen.
* The Download Character option in initial character lineup screen is no longer displayed if SUI_GOG flag is used.
* Updated Help menu (Activity help text has icons now)