Ok, what you ask is possible. first what you have to do is put the clock on a low layer like 1. Then make a picture on layer 2 that fills the whole screen that matches your wallpaper (or dont even use wallpaper just just full screen pictures like i do. Then in the spring boards that you are using to open your custom tray, use it also to open the picture thus covering layer 1 and making your clock disappear.
You just need to experiment. there is a lot that this home replacement can do.
For instance, you can have one spring board that opens 4 other spring boards simultaneousnessly then each one of these can control certain menus or folders and widgets. then from within each one of these you can have it so clicking each spring boards will either close all other boards or keep them open depending on the group that you lable them in.
i encourage anyone to give this home replacement more then a 20 minute try because it takes a while to figure everything out. I wish the the developer would make a tutorial on how to take full advantage this.
one word of advice. don't bother using any of the themes that you can download because they are set for other phone with other defaults and other programs and widgets and they will not work properly on your phone. just go to edit and start a new one from scratch.
it takes a while to get what you want. for example if you want a custom icon there are 2 ways to get this. first you can create a picture containing the icon you want and then create a custom drawer, exit edit mode then long press that drawer to add the icon from a list of your apps. then go back into edit mode. edit the custom drawer to lock so you can not add more apps or remove this on. then edit icon style and change icon blending to clear so it is invisable thus only showing the icon picture you added the first time. blahhhh... sounds like a lot of work. well it is.
the other way is to use desktop visualizer. create a widget with the one you want and then it is done.
be patient and give it a try. here is a theme that i created.
first is the home screen, press the android and it opens a spring board to other spring boards with commonly used apps and widgets. second is my app drawer, this is the bottom screen. swipe up and it brings you here, back button returns to home screen. the last is the just more folders and stuff. i plan to do more but it takes time.
hope this helps anyone who is willing to give sweeter home a try.