[SOLVED] [HELP NEEDED] Different sidebar for different categories

First things first...........a warm greetings...!!!

As a wordpres beginner, I've been using atahualpa for quite some time..and no wonder this is the best free wordpress theme i have ever used.. the flexibility it gives to wordpress beginners.. hats off to the creator.

I was wondering if I could assign different sidebar for different categories. I searched on this forum but didnt find my answers...

Here is my shopping site http://www.pspforsale.us where i want to have 3 country specific store as category...and i want my visitors to see different sidebars for each country specific category..also i am hoping to add category link in page menubar instead of regular page bar.

I guess it can be done by someway but i couldnt figureout how. You see I am not a tech savvy nor english my native language so I'm waiting for a step-by-step guidance by any expert out here.

I would be very grateful for ur help.