moving pagination code to model

Hi
   I have the controller code as below

  # step 1: set the variables you'll need
            page = (params[:page] ||= 1).to_i
            items_per_page = 20
            offset = (page - 1) * items_per_page
           # step 2: instead of performing the full find, just find the
record count

            @search_sd_ticket_count_result =
ServiceDeskTicket.find_where(:all,:select=>'count(*) as count1' ) do

sd>

                                 end

            record_count=@search_sd_ticket_count_result[0].count1.to_i

            # step 3: create a Paginator, the second variable has to be
the number of ALL items on all pages
            @search_sd_ticket_result_pages = Paginator.new(self,
record_count, items_per_page, page)

            # step 4: only find the requested subset of
@search_sd_ticket_result
            @search_sd_ticket_result =
ServiceDeskTicket.find_where(:all,:offset=>offset,:limit=>items_per_page
) do |sd|

                                 end

How can I move this code to model so that to call it other places also

Sijo