sony ericsson w300i

[SeaMonkey]

HI =) ,im a w300i user,.i a bit c0nfused 0n h0w diz tingie w0rk 0n w300 f0nez..um,i heard a l0t 0f n0ise ab0ut cust0mizing,flashing..i want 2 try it 0ut to0 but im a little bit c0nfused,um,can u guyz add me up 0n ur list s0 i can determine wh0's using d same f0ne?.?..i want 2 upgrade my w300i firmware but i am aware 0f failure,um,juz want hir 2 get well inf0rmed 1st.

For start read this 2 tutorials
USB Flash Driver Installation - Guide - Top Sony Forums
XS++ 3.1 Guide-Flashing, Customizing, Recovering - Top Sony Forums and you MUST
backup your phone GDFS and chance to break phone is minimum with this little step