For numbers 1 3 and 4 I can help

For the "packs" problem, you need to un-pack the files with vercingetorix's xpak, mod the files, and then re-pack them. You can download the xpak on totalwarcenter.com. The alternate is to make a mod folder, you can find that in the Scriptorium. I can't post links because i'm not at home...sorry...

For number 3, go to your BI icon and change the target name in properties. The end of the line should say "...RTW-BI.exe" -mod:data". This will make it work just fine. PS. put in the BI disc

For number 4 in the Provincial campaign there is no options at the start...but you can simply change them when you start the campaign. Just go to options, game options, and select what you want (battle time limit, etc)

For number 2, sorry I have no clue on sound but maybe someone else will get to you

Any other qusetions just ask