I adapted Chomu's Mimi Chrono to the changes Ubisoft made to the 1.4 and 1.5 menu_1024_768.ini file. This file controls almost everything you see on the screen. Any large Mod you are using will probably include their version of this file to enable new features and details of the MOD. If you use a chrono Mod and enable it before for example, Real Fleet Boat, you will not get the mini chrono since the file will be overwritten. If you enable it after RFB then the changes the RFB team made will not appear, probably making the Mod hard to use.
To defeat this you need to check all of your installed MOD's Data\ Menu directory for a menu_1024_768.ini file. Take the last Mod's file and copy it to the "Your MOD"\Data\Menu folder that you will have to create. Download this file
http://home.comcast.net/~ancient25/Files/ClockMod.txt, open it and the copied menu_1024_768.ini in Notepad and paste the G29 lines over the ones in the ini file. Enable "Your Mod" after all the other ones.This will give you the smaller chrono. Remember, for safety's sake, to leave the original file intact and only modify the copy you made.
If this sounds too complicated let me know what Mods you are using and I will make a mini chrono one for it. I already have one done for RFB.