How do I trick SEUS to install another customization?

---

My phone is a Nordic Generic phone. But I did install the Norwegian Generic rom to it, but becuase this is a Telenor branded one I want to go back to the Nordic one.
Tried changing the build.prop file to trick SEUS to download the Nordic firmware but it just throws me a error about my firmware being customized before it starts downloading the firmware.

Does anyone know how to trick SEUS or maybe know of any Nordic firmware (1257-6087) to download? Old or new doesn't madder..

Flashtool the Europe Generic one.

Originally Posted by K900

Flashtool the Europe Generic one.

I know I could do that. But I want to have the Nordic one just in case I need to send in my phone for service.

A couple of years ago when I used the SE X10 Mini I just changed the build.prop file to change firmware/branding.
Is this possible somehow with Xperia S?

After some testing it seams like the Nordic Generic (1257-6087) firmware does not exist..
I now have the Norway Generic (1257-8821) on my phone. When I tried changing build.prop and cust.prop to match 1257-6087 PCC would always turn off and check my phone before downloading any firmware. But when I change them to match the Swedish Generic (1257-6919) it downloads the firmware to blob_fs before checking the phone, it does complain and does not update the phone but since the files have been downloaded I can update it with flashtool.

My SI number is 1257-6087 but it does not seam to be any firmware with that customization number.. strange..