Manage calendar XML file from admin panel

Hi I have small problem and need help. Can anybody please give me some tips how to make script witch will help me to manage XML file? I have flash calendar witch is using events from xml file and I need to manage this file XML structure: year number=“2008” month number=“1” //Witch define January (for example) day number=“1” text txt=“some event description” link url=“link to event description” text txt=“another event” link url=“another event link to event description” /day /month Anybody can help me create a script witch allows to add and edit events?