From Processing to Arduino and then from Xbee to Xbee. Small bug :X

Fortunately, I have an Arduino Mega and am currently trying to figure out how to get that to receive from the USB from Serial1 and print to the Xbee on Serial. Hopefully that'll sort this out. Let me know what you guys think! Thanks. -Joe

Can I use the alternate Serial ports on the Mega without the second USB-to-Serial connection? I only have a standards cables and not a USB TTL Serial cable. Am I screwed until I order one?