featured slideshow Insert code

Hi guys im trying to install a Featured Slide Show on my front page.

I installed Featured SlideShow 1.1.1 (Plugin)

But im having some problems,

In the help text file it says:

Place the [feature-slideshow] shortcode in a post / page, or put ( feature_slideshow_init(); )in your code, where you want the slideshow.

I dont want to place it in the post i want to place in on my main page
where do i insert the code: feature_slideshow_init();

in the Theme php files! but where?

thx in advance