I cant go to the Nexus website right now because I'm at work but look for minute minder if you want a cool ingame clock + time at half speed.
Also you should track down XFO. It is a package with dozens of changes in varying degrees which you can load up individually, including one that really reduces the speed that time moves at. Personally I play with minute minder at half speed, which I think is 1 minute = 15 so 1 hour of play (usually the most free time I can allocate to gaming) gives me about 15 game hours.