Inner Fender Replacement

I have a damaged inner fender on my 73 dart. How hard is it to replace this? Is it just a matter of drilling out spot welds and welding it back in? Only the passenger inner fender is damaged so I don't need to replace both as seen in the other post going right now. I have a friend who does body work and painting but I'm not sure if he's ever undertook anything like this before. I appreciate any help. Thank you.