Oh, one last thing. Did you strip the screw itself, or the head of the screw? Because I stripped the head and can't open it with a screwdriver anymore. The screwdriver just can't grip the inside of the screw because it's just too worn down, that plus sign in the middle is now pretty much a circle! (I think the reason that happened is because I used to use a really small screwdriver to open it, which wore down the head of the screw.)
Another solution that my mom just came up with is needle-nose pliers. They're these very precise, small-tipped pliers often used in jewelry making, and if you grasp either side of the screw with the pliers, then turn counterclockwise (left), it might come off that way.
Don't use that screw again. Check a hardware store to see if they have any screws that are the same size and shape as yours (with a Philips head, that's the plus sign+). You really don't want to end up buying the ones with a hexagonal head because you have to use a hex key/Allen wrench to open those.
Good luck! I'm currently working on getting the screw out of the battery hatch--I managed to get it out of my Tama-Go though.