MyBB Community Forums

Hey there,
I recently installed mybb to one of my forum. Later i added google seo plugin to that. Now my urls are showing as
http://www.mywebsite.com/forum-2.html
and threads to
http://www.mywebsite.com/thread-1.html

instead i want them to be displayed as
http://www.mywebsitecom/forumname
and thread to
http://www.mywebsite.com/1-"threadtitle".html OR
http://www.mywebsite.com/forumname/1-threadtitle.html
please suggest modifications both to .htaccess file and plugin.
Thanks in advance