From the manual which you can download from
here
PC Suite
PC Suite contains applications which help you
• to conveniently manage various phone functions from your PC
• to synchronise contacts and calendar items between your phone and your PC Personal Information
Manager.
• to draw and edit caller group graphics and picture messages.
• to create new ringing tones for your phone.
• to select the connection type used when connecting your PC and your phone.
• to back up and restore personal information from phone to PC or to another phone.
• to install Java applications from PC to your phone.
And the Nokia PC suite V4.81 you can download from:
Old Version of Nokia PC Suite 4.81 Download - OldApps.com