This is my mod and I worked completely from scratch on it. 
This enb relies on the timecycle. 
If you want to adjust something for personal preference, modify
the timecycle. 

This is a super upgraded version of my city time V4 mod
http://www.gta4-mods.com/misc/city-time-v4-f11213

To edit the timecycle I sugest using TimeCycIV
This tutorial helped
http://www.gtaforums.com/index.php?s=bfd2ff2ba8d641531c741f9cb0db121e&showtopic=474392&st=0

The enbfiles and enb shaders etc, I forgot where I got them from. 
I can only thank the whole GTA IV community :)
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You have my permission to modify this mod as much as you want to. 
Give credit where credit is due :)