Upgrading your scanner would solve most of your problems but takes $$. A good scan makes editing go faster without any problems. Which mags are you trying to preserve btw? I would stick to dead mags if you're worrried about copyrights but I dont think thats a big issue. Just stay away from Diehard gamefan mags. lol
If the scans are good quality someone is always willing to help edit it for you.