OK.. sorry. I'll try again.
I understand from this post that to send a hex value out of the serial/usb port, you need to use the form "Serial.write(0xAA);", one byte at a time or as an array. I have 273 bytes to send in the form shown above, so I'd have to re-code the string with commas and the '0x' string. I'd like to find a library that I can call to do this for me by sending it the raw hex string.
I guess I could have done manually it in the time it took to explain it, but I'm looking for a general answer. Sorry.