I'm stuck as well. I use ELS and textures but nothing else besides a call out mod (for police calls). This sucks. I've tried every work-around I've read the past week from launching the game first, then waiting on launching the new RPH to no avail. I've updated my script hook but I think it was an older update, still nothing. I've tried turning the LOAD AT STARTUP on/off, nothing! The new RPH gets to the load screen then tries to load forever to no avail.
At this point I can wipe it/reinstall and play vanilla GTAV but what's the point in that. I'm going to wait it out and see.
From someone that has played (and still does) Skyrim, I will saying modding for GTAV is pathetic. Yes OpenIV helps but with Skyrim using Nexus Mod Manager is awesome. You can easily track, turn on/off mods, delete/disable mods with a click of the mouse without having to delve into sub directories and hope you delete the correct .DLL file.
How did you fix yours?