Rule Request: Tv Show Season and Episode

I was wondering if someone could help provide how I would go about creating a rule to Automatically Add Season and Episode Number to tv show names?
Sometimes the shows come in as ShowName.S0xExx, and sometimes the come across as Show.Name.xxx
I really want to have a rule created to say if S0xExx not present the add to the name before moving to my conversion folder, the only other problem I see is it needs to detect if it is S9 or lower and add the S0, any help would be greatly appreciated
Sometimes the shows come in as ShowName.S0xExx, and sometimes the come across as Show.Name.xxx
I really want to have a rule created to say if S0xExx not present the add to the name before moving to my conversion folder, the only other problem I see is it needs to detect if it is S9 or lower and add the S0, any help would be greatly appreciated