Sometime Today, RB cobbled together some glyphs to say:
warning: mplayer-1.0-0.16.pre7.2.fc4.i386.rpm: Header V3 DSA signature: NOKEY, key ID e42d547b error: Failed dependencies: libXvMCW.so.1 is needed by mplayer-1.0-0.16.pre7.2.fc4.i386
you should have used yum to install it.
Note that your problems are not technical, they are legal. Licencing issues make it illegal for distributors to set up multimedia reliably on a default install.
There are simple instructions to follow - installing the mplayer rpm and its associated dependencies (can be done automatically in about one hour using yum).
To meet your targets, what you have to do is experiment with a few systems until you get your checklist complete. You need to identify every task that needs to be done, make a printout, and stick it on the wall above where you set up boxes. Then run through that checklist for every box.
It generally amounts to stuff like - Install distro, update software (probably kernel as well), set up USB, set up flash devices, set up printer, set up scanner, set up multimedia, set up webcam.
It will help for you to have a local repository of all standard packages that go into your boxes and update them maybe once a week.
I've had to do the same on every box that I've worked on, and it's starting to get routine.
Philip