I found the following way of installing the driver, can anyone please verify if this will work?

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Linux Drivers

Instructions for Use:

Steps are as follows (with sample explanation to follow):
* modprobe the usbserial driver directly for the device
* ppp dialer config

How to do it:
Plug in your modem, and then use the 'lsusb' command.

Code
user@linux:~$ lsusb
Bus 002 Device 002: ID 1d09:4000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000

Here we get the USB vendor and product ID's (the first one, in this case).

Now we load the 'usbserial' driver specifically for this device:

Code
user@linux:~$ sudo modprobe usbserial vendor=0x1d09 product=0x4000

As you can see, we use the first segment of the ID number as the vendor, and the second segment as the product ID, both with 0x prepended.

Now, we check /dev to see that the devices are there:
Code:

user@linux:~$ ls /dev/ttyU*
/dev/ttyUSB0 /dev/ttyUSB1

Next step is to configure the ppp connection. Since this example is done on an Ubuntu installation, we can use the Debian pppconfig utility

Code:
user@linux:~$ sudo pppconfig

In this utility, you enter the your username, password and the telephone number as needed, and then save the connection. Be sure to pick a descriptive name, as it is what you will be using to dial it up. Exit, and then we're ready to dial.

Dialing on Ubuntu:

Code:
user@linux:~$ sudo pon neotel

Where "neotel" is the connection name you picked in setup.

And that's it. At this point if nothing went wrong, you'll have a fully working ppp0 connection up.
Code:

ifconfig | grep ppp0
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Thanx