Hey, allow me to hijack this thread for a second, since I really don't want to make another one, and I'm seeming to have the same problem.
I have the coolroom ROM, just like Bob, on the PJ64K window, the good name comes up as "Bad ROM? Use GoodN64 & check for updated INI." When I try and join a room in Emularena, a popup comes up saying "This ROM is not available on your computer!" When I try and create my own game, only the option to make an Away and a Chat room comes up, there's no option to host a game myself.
I know it has something to do with that good name not being "Super Smash Brother (U) [!]" but for some reason I can't get that to change. I tried downloading the ROM from where Umbrasquall said to, ROMhustler, but what I downloaded came up as a '7z' file, and PJ64K didn't let me use it.
Any suggestion on how I might go about fixing this problem?