W880 original acoustic driver

Hi, this is the first time I post here.
I've read about modifying the acoustic driver here, but frankly I'm overwhelmed by all the information which is hard for me to understand.
I have some questions, and please bear with me.

WHen people are talking about the acoustic driver, are you only talking about how it sounds when using earphone (music only)? Will they also change the volume level of the ringtones ? I have W880 and my only concerns is only about the ringtone volume which is too small for me to hear in noisy environment. So far, my solution is to increase the DB level of the ringtones to max 105db. It works but surely the MP3 sounds like complete crap (cut off everywhere), but at least I can still hear it in noisy places.

Will acoustic modification improve the speaker volume substantially ? Say at least 30-40% ? Will this solve my ringtone volume in W880 ?

WHere can I download the oiriginal W880 acoustic driver ?
I need the original acoustic driver for W880 as a backup before I do any modif.

Sorry if the questions are so noob. Thanks