Use riivolutionisobuilder off github, then imput your wii party iso/wbfs, then go into the files of dii party (version) file and select the .XML file. put a location to put the modded iso/wbfs (your sd, usb, etc...) and tada.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi