First, you have to buy the Nagiwara device, it's a little dongle that you have to plug on the serial port of the VZ90.
It gives you Bluetooth ability to connect on internet using a mobile phone or a GPS.
VERY IMPORTANT, the Obex layer is NOT implemented in the Nagiwara driver, so you CAN NOT exchange files using bluetooth...
I tried to mail them a while ago, yet no asnwer
I°) Installation: 
Go to the CD-ROM and browse it.
Go to the "HSC" directory and copy file BT_adaptaterSet.prc to your computer.
Manage to copy BT_adaptaterSet.prc to RAM, no need to soft reset.
II°) Bluetooth configuration:
Plug the bluetooth nagiwara device and launch the "BT Ada Utl". The red led on the nagiwara should blink.
We need to "discover" the bluetooth device (mobile phone) we want to use.
For that, we need to tap the right button to scan for Bluetooth devices.
The BT Scan done, you choose the device (Left button to choose, right button to cancel):
And input this data:
ON
ON
0000 (bluetooth code)
60
Then Tap the Left Button to confirm. (The right button is "Cancel").
Then you got two confirmations window that comes, you need to tap "OK" both times.
Then the software exits and comes back to the launcher.
During the process (after the exits) your mobile should ask if you want to add the "Clie-BT adapater" to your trusted devices.
If you need to change some of the the data, launch "BT Ada Utl" and use the Left button.
III°) the Palm Preferences:
On the Palm, we need to create a Connection and a Network.
There is a tip for the the Connection, usually we use the Bluetooth, here we have to choose Cable / Cradle.
Launch the Palm Preferences:
1°) The connection:
Make a new Connection.
Parameters:
name: gsm
connect to: modem
via: cradle/cable
dialing: touchtone
volume: low
Tap on Details button (right button):
Speed: 57,600 bps
Flow Ctrl: Automatic
Init String: AT+CGDCONT=3,"IP","websfr"
Tap OK button.
Tap OK button to confim the Connection.
2°) the Network:
Make a new Network.
Name: bt
Username: G
Password: G
Connection: gsm (the one we created
)
Phone number: *99***3#
Of course you need to put the data of your provider here... 
Tap on Details (left button) for the IP configuration:
Protocol: PPP
Idle: Never
Uncheck automatic DNS.
First DNS: 172.20.2.10
Of course you need to put the data of your provider here...
check Automatic IP.
Tap on Script (right button):
You shoud have nothing there
Tap OK Or cancel (Right button) to exit.
tap OK to confirm the IP configuration.
Now you can try the connection taping the right button
Linear Mode
