See posts 24 and 30 in this thread:
http://www.enworld.org/forum/showthread.php?t=232488
Those might actually answer your questions.
Relbanan, I was wondering if these were the labels you purchased?
http://www.staples.com/office/supplies/p1_Staples-Print-Write-Multiuse-ID-Labels_97308_Business_Supplies_10051_SEARCH