[bsaunder]

I guess I could do all that (truth be told, my C's a bit rusty for a prompt answer).

How 'bout:

  $echo -n "YC" > foo
  $hd foo
  00000000  59 43                                             |YC|
  00000002

Yeah, I know, perhaps 4359 might be better.

(UPDATE: fixed code spacing)

[icky]

:-D