Well, a new problem has arisen. Ragehook seems to be hung up at the "waiting for gmae window..." prompt at the Rage Plugin Hook logo. I installed LSPDFR, LSPDFR+, Arrest Manager, and one vehicle using OpenIV. I'll try disabling some mods and/or removing the car to see if it works.
Ok, so I just tried launching GTAV not using Ragehook and it doesn't start. So it's not Ragehook, something is preventing the game from starting. I have a feeling it's the car mod. I will try to get rid of it and try again.
*Also, I can't seem to update ASI installer in OpenIV, I click update and the bar turns from orange to green, but the blue bar at the top still says I don't have ASI loader installed. I don't remember having this much trouble when I first tried all this earlier in the year, but uninstalled it.