i love the mentality of the higher ups that think technology is just something you can poke a stick at and it should work.
tell em to get you proper training or you can't be held responsible for anything pertaining to your network. you could try this angle....
the amount of time it takes you (the untrained guy) is probably 4 to 5 probably more (no offense) times longer than a guy with a few classes behind their belt. they will make their money back in a couple months in productivity!!
couple things about training... ITS EXPENSIVE! 8 -12 week microsoft class can cost you around 15K! I know this because that is what I paid. If you do take the classes make sure you interview your teacher/school and find out what kind of real world experience he or she has had.
google. "paper mcse's"
Microsoft classes are based of the exam's. Make sure if you are planning on taking a test or two you do it right after the class... those suckers ain't easy.
If you are doing hardware and network troubleshooting... I highly reccomend you take a class in that.. they usually pair them together..you can find ton's of practice test online for the A+ and Net +.
I was under par for the most part in school as well but when you have to pay $125 per test non refundable...It kind of motivates you to do a touch better

hope that helps a little.
good luck bob.