Repair SEMCBOOT after AERIX

Many people (especially W902 users) complain about poor battery life after unlocking with Aerix. You can now solve this problem following a few simple steps.
1) Start up Aerix, and press unlock
2) Remove battery, reinsert, and plug in USB cable,using 2+5
3) Wait
4) AS SOON AS IT SAYS "RESTARTING PHONE" HIT ABORT
5) You should get numerous error messages in the log
6) Open up D-Ultimate Unlocker.
7) Choose your phone model, "no lock change", "set certificate to brown" and make sure only "REPAIR EROM/SEMCBOOT" is checked.
8) Connect phone while holding 2+5.
9) Open again D-Ultimate Unlocker.
10) Choose your phone model, "no lock change", set certificate to red" and uncheck "REPAIR EROM/SEMCBOOT".
11) Connect phone while holding 2+5.

so how mutch it costs? i have d unlocker, but ust get couple of errors instead of converting smthng to smthng.. i dont have my username or password, so what should i do?
i have fast battery drain and some fer other errors like split screen on my lcd some times, and sometimes wery fast screen blinking, i think this is erom bottrom error :? so need to fix it..

Thanks for the instructions but how to do it without buying D-Ultimate Unlocker ?

Edit : Hmm ok I did it using the trial version of D Ultimate Unlocker. Will see if my battery lasts longer ;)