Well not knowing what version of tasks you are using makes it harder to help.

There is a way to hide all modules in litestep from one bang.
Its like !lshideallmodules or something.
Someone help me on this one.

But if its just taskbar giving you an issue then just do this. Add a popup entry to unload taskbar before playing cs.
If the lexus theme has a theme popup Shift+left click add this.

Assuming you are using OTS2 version of litestep.
And you are running taskbar3-0.306_alpha-3.
Check the theme.rc or About in the litestep menu of what version you have.