The easiest thing to do is this:
Open WBConfig (what you open to change a skin)
Click on "Settings" on the left side
In the window that appears, about a third of the way down, you will see "Use the taskbar and startmenu from this style:"
Underneath that in a dropdown box is "Use the taskbar and startmenu from the current style" with a dropdown arrow to the right - click on that arrow and select the skin with the taskbar you're wanting.
Click on either "Apply settings now" in the upper right, or click on Style in the upper left to go back and pick the skin (window frames, menues, etc) that you're wanting to use.
That'll use the skin's taskbar, taskbar buttons, systray, startmenu, etc. - "everything down there". See if that works for you.