You can do that, but you need to have defined RID_BACKGROUND in the file. (You can't redefine RID_GENERALBG; it's defined in another file or something.)
If you need another thing, change RID_GENERALBG to, like, RID_OPTIONSBG for the options menu.
You'll also have to add something to the subroutine that builds each menu to change the background, but doing that isn't really something I could walk you through.
Roleplay set roughly in a fictionalized version of Phoenix, Arizona. The time varies, with a lot of flashbacks / stories told through old photos as well as flash forwards to later times, but is intended to be one continuous story. My character is about 5 years older than myself, and considerably richer. lol. I have a couple of other made-up characters for the RP too.
Current cars:
- Nissan Skyline GT-R V-Spec (BCNR33 1996 S2)
- Toyota Supra (JZA80 1993) - auto N/A; work in progress
Will the R33 ever be released? When? : The R33 is a long running work in progress that will be released when it's done, and not a moment sooner. I'm definitely being a perfectionist about this, but I want this to be the mod the community deserves and expects, not merely the latest in a set of stop-gap mods.
Will you be making a Mustang 2015 / S550? : Not after the large bunch of other stuff I'm planning to make is all done.
Is that your mod in those screenshots? : Is it the Skyline R33, the Audi A5, the Crossfire, the Supra JZA80 (with Bigg Boss93) or one of the ones I've released (like the Mustangs)? If so, yes. If not, probably not; search the GOM and VStanced downloads sections for it.
Mustang mod updates? : A new SN95 1995 Mustang mod is planned (the original wasn't mine); a Foxbody remake with LOD0 meshes is in the works, and will include more parts than the original version; and I am preparing updates to the SN95 2000, many of which are finished but not there yet.