Siemens SX56 help..

so... i just bought one from ebay a few days ago. i love the phone and everything, its just that I don't know how to connect to the internet, get my own ringtones & wallpapers, and sync stuff to the phone.

*i never recieved the installtion cd, im not sure if i really need that or not.
and i used to be able to just go to mobile17.com and create my own ringtones & wallpapers, but i don't recieve messages from them.

so help please?!