Can any site add Seeksmart search box  to their page? 
You can add Seeksmart search box to your site as long as: 
Your site does not contain violent, abusive, misleading, bigoted, hate-oriented, adult content 
You do not alter the appearance or size of the Ask Jeeves buttons or test links 
You do not charge, resell or re-license users in any way for using Ask Jeeves links 
You agree to the terms and conditions of use of Ask Jeeves links

Is it easy to do? 
Yes. Simply copy and paste the code below into your page's HTML. Choose the layout that works best for your site.