Re. cdc_acm:

This is for different devices providing ttyACM ports. If the other modules work, this one will too - but you won't need it for your modem. Phones often provide this other sort of ports.

Re. module loading:

PPP Widget will load the modules automatically every time. Once you make sure ...

Firstly, thanks for taking the time Josh.
Running them in the order you suggested generates this:
u0_a106@android:/sdcard/pppwidget/lib # insmod usbserial.ko
u0_a106@android:/sdcard/pppwidget/lib # insmod usb_wwan.ko
u0_a106@android:/sdcard/pppwidget/lib # insmod option.ko
u0_a106@android:/sdcard ...

Josh wrote:Oh, and I need your exact kernel name (see "About Tablet" or "About Device" in the main setup menu).

3.4.5-g4e6298b

Here's the last line of the giant output:
<4>[13579.256417] usb_wwan: Unknown symbol usb_serial_port_softint (err 0)

Or maybe you need to see more of it?

I obviously suck at using the terminal. As you can see the files are in place, but I can't run usb_wwan.ko.
What am I doping wrong? I`m Nexus 10 btw.

255|u0_a106@android:/sdcard/pppwidget/lib # ls
cdc-acm.ko
option.ko
ppp_async.ko
usb_wwan.ko
usbserial.ko
u0_a106@android:/sdcard/pppwidget/lib ...