FreePBX GUI modification

Hi All,

Is it possible to modify GUI of FreePBX webpage, I mean can i modify it to remove/change logos, weblinks etc. Will it require any license to be purchased from FreePBX / Sangoma, or I can just go ahead and change PHP files as my need.


Thank you James for your response.
I had checked about OEM program to modify GUI and create a custom FreePBX distro, but it is very costly. So I was looking to modify it by myself (my requirements are very minimal, and I think I can do it by myself), but then wanted to make sure that I am not violating any license agreements or rules laid out by FreePBX and Sangoma.