sounds like an excellent idea; I wish all boxes were designed like APS/Teva's, where the drug name is printed just above the space for the dispensing label...
The problems start with PI's, where you could be covering the only bits of printed information in English, if you stick the label directly below th licensed name; also, you could be obscuring the expiry date...
The best "tip" i ever read about for helping to check scripts was "read the script out loud", especially when dispensing and checking on your own (saturdays etc...): apparently, it's a different part of your brain that processes the information from your eyes, and that from speech & hearing; so, even if your eyes have convinced you that the box of amlodipine 5mg you've picked off the shelf is right for your script, when you hear yourself say "amiloride 5mg", you'll realise your mistake...
As they say in a certain supermarket: "Every little helps!"