Restrict AdminCP access by IP Address in .htaccess?

[findingpeace]

With all of the hacks recently, I would like to increase our security, and I think the AdminCP is our last remaining weak link.

Is it possible with .htaccess to restrict all files in that directory so it can ONLY be opened by certain IP addresses? I understand that IPs change - that's fine with me. I would prefer changing that occasionally, over entering an extra password every time.

Thanks