Fully voiced BGEE and BGEE2

Hello everyone. I was just wondering if someone could answer a couple of quick questions. I'd really appreciate it.

I was wondering... If say someone(me) was to attempt to voice all of the unvoiced dialog in the game, including every non-essential NPC. How would I go about doing that? How would I implement my voice into the game and to match to the dialog shown on the screen? Also would it be possible to voice item descriptions. So that my voice would play once the item description is open?

If my question are not clear enough, please let me know and I'll try and explain better.

Thank you in advance!