labels as tabs and subtabs in google blogger

Question

I run a blog in google blogger. I have many labels and I am searching for a way to make labels as tabs (where the pages gadget/widget is) and subtabs. Let me be more specific. I have a label called Games and four labels called PC Games, XBOX 360 Games, PS3 Games and Wii Games. What I want is not only each of the labels to be put in the pages gadget/widget is ( I found some information on that matter here) but also a way to make the four specialized labels that I mentioned in my example to be put in a droplist under the label/tab games (i want the droplist to appear when the mouse hovers above the tab games and also that tab to be clickable and show all the posts I have labeled Games