>>50430437i used audacity to get the cleanest isolated vocals possible by taking the FLACs of the original ghost and the instrumental version of ghost and inverting the phase of one of them. then i ran the (almost) isolated vocals through x-minus, it has an option to take out only the lead vocals and leave the backing ones there, and then overlayed the output with the original official instrumental version.
i could've simply run the original through x-minus with the option to leave the backing vocals intact but the program is kinda noisy and the output sucked so i went with the long way.