You will not understand, kp-49 is Compatible with bleeding-edge and wl1251

Just copy and decompress the file wl251, do not run the installation kernel (kp-46modified), reinstall apt-install kernel-power x-terminal from the script to execute wl251 only:

sudo gainroot
sh MyDocs / purge.sh

or (this is to use the driver, on Any Network):

Using the driver
--------------------

This procedure is required after every reboot of your phone, if you want to
use this driver!

* Open X Terminal

* Gain root access

~ $ Sudo gainroot

* Load the driver

# Cd MyDocs/wl1251-maemo/binary/compat-wireless
# Sh load.sh

* Unloading the driver (just in case you run into problems and want to
switch back to the stock wl12xx driver)

# Sh unload.sh

Simple, do not have to do more