Browsing 4chan's imageboards with Opera

I'm an infrequent user of Opera that would like to switch completely.  The problem is that I browse the imageboards of 4chan in Burichan style because it's easier on the eyes.  You see, I currently use Firefox because it has the 4chan extension and that's pretty much it (it would be fantastic if someone wrote a widget for Opera that will do what this extension can).  My question is, is there any way that I can make Opera keep the style set on Burichan while browsing?  Switching the scheme to Futaba is harsh on my eyes.  If I can do this, how would I go about it?  Any help would be appreciated.  Thanks in advance.

>>4
Whenever I close the tab of 4chan I'm viewing and then go back later it always reverts to Futaba.  Even if I set it to Burichan it changes back to Futaba when I click to reply to a thread.  I accomplished what I was looking for by going under Tools -> Quick Preferences -> Edit Site Preferences and then editing the cookie for "nws Burichan" to expire in one year.  Apparently it doesn't work like that.  Do you know what else I could try?

>>5
That would be awesome.  If someone could post that with an explanation of how to use it, it would be fucking great.