[shan]

set the pos field on categories for section 1 below say 500 and section 2 above 500 then within the categories loop do something like

{section name=cat_num loop=$categories}
{if $categories[cat_num].order_by < 500}

blah blah

{/if}
{/section}

then create a new tpl for categories2 with similar code but > 500

now include the new categories2 tpl file below the std one in home.tpl