All you need to do is define a function that supplies the prefix to
org-time-stamp:

(defun org-time-stamp-with-time (&optional inactive)
  "Prompt for a date/time and insert a time stamp containing a
  date and time. All parts of a date not specified by the user
  will be filled in from the current date/time. So if you press
  just return without typing anything, the time stamp will
  represent the current date/time. If there is already a
  timestamp at the cursor, it will be modified."
  (interactive)
  (org-time-stamp t inactive))

Then bind that you a key.

On Sat, Jan 30, 2010 at 10:48 AM, John Withers <grayarea@reddagger.org>wrote:

> Folks,
>
> I am trying to figure out what to add to my .emacs to make the normal
> key binding call to org-time-stamp into the version with the C-u
> modifier by default.
>
> That is, in the default bindings, I am trying to make
> C-c .
> Perform the action that is normally performed by
> C-u C-c .
>
> I am sure this is dead simple, but I have no immediate clue how to do
> it. If these were two different functions I would know how to do it, but
> using the key binding commands I don't know how to tell my key binding
> that I want the C-u version.
>
> Any help would be greatly appreciated, as I am sure I will have use for
> this in many other places as well.
>
> -john
>
>
>
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