Openwebmail 2.52

I am deeply attracted by the new features of web disk and personal calendar in Openwebmail 2.52 which I tried yesterday. Web disk can be used as a ftp account and I would say Openwebmail has successfully integrated email and ftp in a web client interface. My PIII-450 MHz server is running RH7.1 which is not compatible with Openwebmail 2.52. I need to migrate the whole hardware to P4 CPU and upgrade the OS to Fedora Core 4.