I tried it, but it says:
TUN support is possibly pre-loaded in your kernel.
This might suggest that the module might exist, but I double checked with lsmod and the /lib/modules directory.
If you have any idea about a kernel version for the phone that might make the Tun.ko app actually install the module, please share.
Also, if anyone else has a working tun.ko module, the Tun.ko app has an option where you can share your module( probably it's sent
to the droidvpn site ).