Yeah it's a rough scenario. I've got a ton of pictures but these forums don't seem to have the ability to upload pictures to them. I'll have to post pictures "the old fashioned way".
All of the older nissans are mine, my brother decided to walk away from the 90s model pathfinders for his 03. (that ones his new baby)
I spent about 3 hours yesterday morning with an air hammer and earplugs removing the core support. It's been tack welded via repairs in the past. I really hate welded parts! The next issue is how I can remove the inner fender thats welded and siliconed to the cab. I'm probably going to leave the inner fenders alone and buy a sortafit core support. I don' think I can remove the core support from the other pathfinders without ruining them.
I'm gonna do my best to repair the inner fenders. They are both damaged but I don't think it's bad enough to warrant replacement. THEN there are the bumper support brackets to the frame. One I broke off by hand and the other isn't far from it.