thanks. I just downloaded a .vkp patch file which extends the sms tone length for both the w830i & w850i (same firmware R1KG0001). And I found out that except of the first block, the rest of the code for both the files were the same. Here were the codes:
;W850 SW-R1KG001
;????? ??????? ???????? ??????? ??? ???????? ??? ?? 60 ??????
;replace time sms sound
;(C) svinuk
;(p) Ploik
4516DA68: 10270000 60EA0000 ;60 sec


and for w830 it was
;W830 SW-R1KG001
;Aumentar tiempo de sonido sms
;(C) HierOS
;(p) Miguel8e
+44140000
;EEB0C0: 10270000 60EA0000 ;60 sec

so can I somehow change the codes, or create the codes for w830i if I know part of them from W850i? Also since SEUS upgrades phones to CID 53, can I like flash the main of my phone from R1GB0001 to R1KG0001 (which is the latest for W830i) through Xs++ or SE tool2lite?