w880i flashing

Before you rage i have searched though hundreds of older posts on hundreds of other, and read through many solutions before i decided to make a new post.

Heres my issue. I have a Sony Ericson W880i and all i want to do is install a few flash themes. It definitely supports flash themes as well before you ask.
The phone was originally locked to one network and i went to a local store to get it unlocked. The guy there did this by flashing the software somehow (this was before i started reading up on all this stuff) so i know that the phone is flash-able.
I read up and stated using xs++. now , i can connect to my phone easily, however it has the CID 53, which i guess is why i get the "your phone is not supported".
Is there a way i can downgrade the the CID?
Another problem i get is where xs++ asks for a file to "Flash Main Firmware" and "Flash File System" I have no idea where to obtain these files. ( I have looked).
If it cant be done i understand and il stop trying. I'm not really up for buying anything either.
I thankyou all in advance for any help you can give.
I can upload some screen shots if it helps
Thanks :)

show us the log xs gave, yes CID can be downgrade with logs using the D-Ultimate unlocker, to be able to use flash themes, you must debrand it first and then use flash themes

Log is -
17:43:12| Baseband ID: 9900
17:43:12| Protocol Version: 3.1
17:43:12| Phone name detected!
17:43:12|
17:43:12| Profiling SEMC phone...
17:43:12| Platform: DB2020
17:43:12| OTP CID: 51
17:43:12| EROM CID: 53
17:43:12| EROM Color: Red
17:43:12| IMEI: 35464901xxxxxx
17:43:12| Phone ID: W880
17:43:12| Region: CENT_EUROPE
17:43:12| CDA: CDA102568/1 R2A
17:43:12| Firmware Version: R8BA024
17:43:12| EROM: R3A016
17:43:12| Ready for operation!

17:45:10| Sorry, your phone is NOT SUPPORTED
17:45:10| Error: Cannot send flash loader
17:45:10| Error: Flashing failed
thanks

MAIN is the OS of the phone and FS is the file system i.e. files that were used in the phone.
Read here : Flash K800 CID53 with K810 software CID53 (for begginers) - Top Sony Forums