ya but i duno how to put

as long as you are using a2uploader, modding the flash menu might brick your phone. Modding acoustic might be easy, but who knows which type of file you are using for the flash menu, & ended up bricking your phone =.=
know the risk & if really want to do it, dont make any mistake

Tutorial For Wbxml Modding to all A2 Acoustics:

The example I gave for editing audio for firewood A2 (on the other platforms just as well). To edit the drivers we need:

Program WinHEX
Sound driver
Well, actually, and patience

So dispel our sound! As usual we start a program WinHEX, open the folder with our drivers that we will edit! . Then simply drag this any driver (which you can edit). List of drivers (which is responsible for what):
Files starting with "farfield" refer to the speaker:

farfield_call - driver loudspeaker during a call
farfield_fm - driver speaker in FM receiver
farfield_play - driver loudspeaker mode proigryvatelya/mp3
farfield_ring - driver loudspeaker mode calling signal
farfield_rec - driver and microphone for video recording on a dictaphone.

Files starting with "PHF_" refer to the headset (headphones):

PHF_play, PHF_2_play, PHF_3_play, PHF_4_play - when listening to music / sounds
PHF_call, PHF_2_call, PHF_3_call, PHF_4_call - when you talk
PHF_ring, PHF_2_ring, PHF_3_ring, PHF_4_ring - when an incoming call (if enabled "Silent"
BTL_play - while listening to the player through BT headset
handset_0_call - the sound of conversational dynamics
Sysconn_fm - radio in the headphones

This is a guide for u to do acoustics modding..
U can always replace the one u wanted to change.. No need to change all..
Normally, I only change the phf files only cos my farfield is perfect already for C702.. If use others, sound not good..
For eaphones, as I am using HPM-70, so modding it using Walkman-modded acoustics drivers is a plus for me 
As for flash menus, it is super easy also..
Just get respective flash menus for ur phone type, (walkman for walkman, c for c, makesure icon gps got or not also)
then u can edit the XML of any theme u like to pair with the flash menus...
after that rename that theme to other name so that u wont replace it with the old one (unedited XML)
then start a2uploader and put ur flash menus inside flash directory
tpa/preset/settitngs/system/dektop/flash
if i not mistaken la... i type spontan only..

here u go,
editing xml isnt that hard, just rename the flash menu to desired .swf accordingly

http://www.se-stuff.net/help/flash-menu.html

that one i know already.. erm..i mean the themes that already sync with that flash menu. no need to edit the xml.

lol.. even the one already sync also need to use a2uploader to insert the flash menus inside ur phone..
it wont be inserted automatically along with the theme.

the phone is kinda laggy when playing music and at the same time sms'ing... =.=

i know that one..i have to put the flash menu using a2uploader but i dowan to edit the xml file..

the phone is kinda laggy when playing music and at the same time sms'ing... =.=

Raw processing power not strong enuff 

the phone is kinda laggy when playing music and at the same time sms'ing... =.=

the same goes for k850

Raw processing power not strong enuff 

try updating ure firmware to r1fa037.the media/pics/videos loads faster on 037.
still on r1fa035?try updating to 037....
completely agree...that's one of the drawbacks with java based phones.
no new mods bro?i sold my w910 already...now modding g900...EVEN more headache to mod....