might i suggest using a disk next time? Or uploading it to the internet, then downloading it? or sending it to yourself via email then downloading it. you have options!
the units will not rout aslong as their is one mage/unholy priest/commander capable of controlling them i think so 10 mages, 9 scripted to raise skeles, raise skeles, raise skeles retreat and 1 scripted to raise, raise, raise, raise, raise, spells should keep them fighting.