custom heroes and cinematics

i have 2 questions i hope someone can answer for me.

1) how do i make a whole new hero from scratch i only know about editing the default heroes anyway........ how can i make whole new ones from custom units etc. this will give me a chance to get the sound i need

2) i noticed when i create a cinematic in the display transmission from unit i set everything up and i put an additional like 8 seconds on it i start the map people come in and the cinematic stays on the screen for like 3 seconds wtf, i notice if i wait trigger after the transmission it stays longer, but sometimes my cinematics get cutt of early and stuff, is this a bug or a problem with the editor?

1) You can't. Custom heroes have to based off an existing hero. To get the sounds you want use the enhanced editor (AKA Blink) from the tools forum.
2) RTFM!!! -- See the sticky post that says check the FAQ?

isnt there a big giant conspiracy theory going on about blinks editor that the sound on it still doesnt work

As far as I know, the only people that have problems with sound in Blink are the ones that didn't read the Readme.txt, because it says in there how to fix it :) But I could be wrong.

in the downloads there is a new Unit Editor. I've never tried it, but it says that u can make heros from norm unit. (so u dont have to base it off a hero)

you cannot change the sounds used by your custom characters if you are making a multiplayer map for play over battle.net because even if you use the enhanced world editer or link in UnitMetaData.slk to your map, wc3's tendency to cache the .slk's at runtime means that it will not be put into effect for your map for all the players, and it is likely that your game will split in battle.net.

thus if you are making a multiplayer map, the workaround is to always derive your custom units from the base unit whose sound you wish to use.

if you are making a single-player campaign map, feel free to do all sorts of wacky stuff to the files archived in the .mpq to get the effects you desire.