Need with my site - search function within my site not working?!?

I purchased this template, customized it and found out it has a search
function for within the site - the challenge is that SEARCH function
is a dummy text box and doesn't work (apparently I have to pay much
more to get it to work). I want to get it to work, but I am unsure
how to do it on my own, hopefully nothing too complicated. The banner
is in FLASH, so I am not sure if this is going to pose another
problem.

Any suggestions welcome,

http://www.bionicbuddha.com