PC Connectivity to nokia handset

Hi,

I wish to connect my Nokia handsets(5120, 5180, 7160) to the PC via
IRDA/COM/Bluetooth.
I am looking for an interface that would allow me to read as well as
write phone information like Contacts/ Appointments/ Ringtones /
Images.

I have already explored the AT command set but it provides only
phonebook information (that too only for GSM phones). Is there any
other option to access the phone information that I have mentioned?
Do I have to use the PC connectivity SDK for this purpose? But it is
not available for all the models.

I am stuck at this point.
I highly appreciate any help on this.

Thanks & Regards,
PC