Hyper-terminal: I don't use it.
RealTerm allows you the option of sending / receiving data either as RAW or ASCII.
as for how do I . . . are you attempting to send to PIC or send to PC ? If issue is sending to PC put numbers inside quotes like "2468" and pic will send ascii, or precede numbers with DEC2468 and it will go RAW, or HEX9A4 for hex.

As for Dave's (Mackracket) question, he is asking if the cytron thing inverts the serial data, as HSERin / out sends data TRUE with a pull up and PC likes INVERTED.