first of all ,they arent Philips screws, thats probably also why your philips head screw driver doesnt work well...they are Posidrivs (if they are original)...but PB blaster them ,let sit for awhile... and 2) dont destroy them, they are very hard to find! 3) the reason they are there is to not damage the paint on the hood...put in a square head bolt there and you`ll see!
also, YES save , take care of those gusset plates ,not reproed either! Hard to find!