If I understand correctly, you have a string with those three bytes in it. You might consider using String to Byte Array. This will help with the second and third bytes--it'll convert them to unsigned int8's.
The third byte is signed, but you can just convert that byte to an int8 and it'll do the right thing. Once you have it in an array of bytes, it should be pretty easy to use Format Into String to create what you want. If you can't figure it out, let us know. Brian
