like to have a ‘more’ in my sidebar (archives)

hi @ all,
i have a monthly archive which is shown in the sidebar. my problem is that i like to display just the last 5 month, not all (because the list becomes to long). i solved the problem with showing the last 5 month as you can see here:
but the other month are gone! can i place a ‘more’ link at the end of the list, which bring me to the older posts?? i don′t know how to do this… (he does: )