Manage new countries groups -

I need to manage countries groups for which we get alerts. Actually we have a list of countries constantly update who we are using also to filter alerts. The problem is that some alerts refer to countries group not to single country. For example we can receive alert about "Europe & CIS". So we need to modify the page [login to view URL] so that the user can also filter for the following countries groups: Europe & CIS Asia & the Pacific Mid East & N Africa