This App Lets You Easily Set Any Song As A Ringtone, It Lets You Select The Songs Starting/Ending Point.
You May Also Change The SMS Ringtone.
1-Go To Cydia>Manage>Sources>Edit>Add
2-Add This Source http://sinfuliphonerepo.com
3-Add Then Got To Manage And Open Sinful repo's Source
4-Search AnyRing
5-Install And Then Customize Your Ringtone