Is it possible to stay with version 1.7 and then add features on a piece by piece basis ?

There are features such as BOARD view and CAPTCHA that I like very much in version 1.7 and I don't want to do without these two features. At the same time, I also like the "bubble" preview feature that version 2.0 has.

Is it possible that I just stay with version 1.7 and then add the "bubble" preview feature as an add-on script to version 1.7 ?

Thanks