Development on Voice Chat

hi there I have voice chat and i need to do some upgrades with it 1- i need to option for each user to change password 2- chat page is too large it's have all code on one page i need to optimiz for it to make code lite and easy to load 3- i need to add option for chatmaster to chosse his color when admin add it ( i have example for this code ) 4- enable chat to work with vista and windows seven " this problem due to my cab file is too old it's has driver for sound work on windows xp only i think the way that program get name of sound card on client pc is defrent between windows xp and vista so i need to update it 5- make chat work with firefox (it's java script problem ) thanks