I've been using a manipulating clock config for a year by editing the InfoPanel plugin.  You can use all the InfoPanel's commands to change the style of the time shown, and choose real time or in-game time (as the player... on command).  I'd use that plugin as a guide.

Are you requesting a change? I'm not sure what this thread is about really.

I was adding to the thread of the developer attempting to integrate a clock plugin - and was suggesting he could use some of the callhooks and scripting from the InfoPanel plugin to help streamline.  It was just a suggestion, and I would much rather use a one time clock plugin than the InfoPanel which was kind of hard to manipulate into our end result.