Why wont sound downloads work?

Why wont sound downloads go into my aircraft. I do exactly as it says- unzip into [your aircraft]\sound\ file!!! it never asks me to overwrite anything!
someone please help!

Im having trouble getting em' to work. Ive downloaded

F1ooextsound (fsdownloads.com)
757aasnd (flyawaysimulation.com)
+ more!!!!!!!!!

will someone please help me troubleshoot the problem!

Ok, I'll give you the Cheeks way to do it

1. Whatever the default soundfile in your aircraft is, make sure the new one has the exact same name (the sound folder)
2. Now, it should've overwritten the new sound folder, so go into the new sound folder, and copy and paste the sounds into FS2004/Sounds.
3. Now, start FS and enjoy your new aircraft sounds

remeber BACK UP your files because some sound files arent vary good

Yes, definatley, I forgot about that

THX GUYZ