Place the zipped file (do not unzip it) into your VPinMAME/roms folder.
Since "spiderm7" isn't a standard mobile ROM but a niche virtual pinball asset, here is a blog post structure designed for the virtual pinball community: spiderm7 rom exclusive
Once approved, you receive a private link to the .zip file and a matching recovery (often a patched TWRP or OrangeFox). Place the zipped file (do not unzip it)