What would be best method to append bootrap css to non bootstrap themes but not affect layout? I want to use Adaptive themes, I like the layout options, however, I like the Bootstrap look and feel.

So I want Adaptive theme layout css with boostrap visual css basically.

What would be the best way to achieve this short of getting into the HTML of Adatptive them and changing all the classes on elements?
You can customize your bootstrap package for download here: 


  Customize Bootstrap's components, Less variables, and jQuery plugins to get your very own version.


http://getbootstrap.com/customize/

After that, you can add just the required CSS/JS to your theme as per the usual methods