So this what I have. The grid actually works and all I really need to do now is add in all the Metadata and positioning of everything. I used <autoLayout>1 5</autoLayout> under imagegrid to specify how many columns I have as well as how many games are shown in the grid. Anyway, thanks again for the help, even though I ended up figuring it out for myself. At least I know that what I did matched your suggestion to a T.
@adambegood No but it's easy to adapt.
Open an existing system.svg and delete the current logo.
Open that PC88 svg file, select the paths, copy and paste in the previous system.svg, scale as needed to fit, save.
That's worked! Thank you so much for the heads-up on that. I've found coloured Naomi and Atomiswave svgs now as well, the Theme is looking good!
Edit: I won't post them as don't anticipate demand, but if anyone wants PC-88, PC-98, Naomi or Atomiswave svgs, give me a shout!
@gamehedpro You click on the Code button at the top of the repository and you can download the theme as a .zip file:
After you extract the archive, you can copy the theme's folder to \\retropie\configs\all\emulationstation\themes (create the themes folder if it doesn't exist) and then you can choose the theme from EmulationStation's menu.