The Relativity mod isn't complicated. Basically, it controls how fast the game clock runs. So an action like getting a drink at a bar will take the same amount of REAL time, but it could take less (or more) Sim time, as reflected by the game clock... half as long, or twice as long, or whatever you want.

I've been experimenting with it too, and it works great for all kinds of Sim activities that seem like they take "way too long".

If you're having trouble figuring out some other aspect of it, though, I'd recommend asking at Twallan's forum

As for the "bars stay open only 12 hours" mod, make it yourself... easy. http://www.modthesims.info/wiki.php..._Tuning_Modding http://www.modthesims.info/showthread.php?t=423675