[Android Themes] contramundi:
actually its a quite simple process, the only crappy part could be finding a matching icon for the app you want to replace it with :) I've just made a small tutorial, but as i don't have uccw directly in front of me some things could be slightly off.

firstly you should have a picture available for the button for the application you want, if a credit is mentioned for for example seriouslycrazy, then look into his thread for the matching icon pack, otherwise try to browse the forum/google/etc to find a matching one (preferably with a transparent background)

note that sliding to the left or right means below the widget's image, so your sliding between the options available. If you slide left or right in the image part of uccw you will move around the currently selected object (this could mess up the widget)

Ok. assuming you have a picture we are going to do the following to edit the button:

1) place the picture on your phone's storage in a folder where you can easily find it again.

2) if you still have hotspot mode disabled, open the widget in uccw by tapping it on your screen, if not, open up the uccw app and in the settings menu disable hotspot mode, as we are going to change the widget that's already been placed on your screen.

--> close uccw and go back to the screen with the widget, then tap it, uccw should open with the widget you tapped

3) above the image of the widget, there's a button titled "background" this is where you can choose between the different things located in the widget. tap it and choose for one of the "image" options.

--> as we are not certain yet which image is exactly what we are going to test it out untill you found the correct one

4) under the image of the widget you see several options. The one we are going to use is called "alpha"

5) make sure you note down the original alpha value before changing it. Then slide it to to left to set it to 0, this should make the image completely transparent. While lowering the alpha value make sure you look at the image of the widget and look at which part is changing. If its the wrong one, set the alpha value back and go to the next image by pressing the button above :), repeat this process untill you found the button you want to change.

6) after finding out the correct image, set the alpha back to the default value, and slide to the right untill you see 2 buttons called "image" and "scale".

7) press the image button and browse to the image of the app you want to have it open up. Afterwards use the scale option and the "position" option on the first page (slide back to the left) untill you have it to the proper size and position.

--> one more thing to do now :)

8) above the widget's image again press the button where you can select the part of the widget you want to edit, this time select "hotspots", this option should be on top of the list.

9) the widget's image should get a few colored squares on it with numbers. Look at what the number for the square above the previously edited button is and below the image press the #.

10) select the number corresponding with your button image and then press the button called "hotspot"

11) select "app" and browse through the list untill you found the app you want it to load up instead.

--> due to changing the image, there is a possibility that the hotspot is slightly off, to fix that use position/widht/height untill it matches again.

12) now you can choose to save the widget so you don't have to proceed the above steps in the future, if you choose to do so its best to save it using a different name, that way you have the original widget as a backup in case its needed.

13) enable hotspot mode again in the menu, otherwise uccw will keep opening once you press the widget ^^, afterwards just go to your screen and test it out.