I keep my 1.0 and 1.4 in separate folders.
1) You're not banned from ECGN, you are probably just missing your CD KEY. Check your rtcw 1.4 folder for a file called "rtcwkey". Open it with NOTEPAD. Once done put your CDKEY there without dashes or spaces all in one line for example: ABCDEFGHIJKLMNOP after that save the file and try reconnecting to ECGN.
2) As for 1.0 hitsounds download them and put them in your 1.0's main folder.
(link below)3) For the blood thing you're talking about if you would like to play with NO blood in your screen you will have to patch your 1.0 with the "pb fix" which then would allow you to disable the blood from being seen in your screen.
(link below)4) If you want links to re-download either 1.0 or 1.4 let me know I uploaded both but, keep in mind both have absolutely no config so you'll have to put your own config in and edit the game to how you want *such a pain I know* I won't post the links publicly since I don't think it's allowed :D but let me know and i'll pm you it =)
5) Elvis and Cassette are two different people :D
HitSounds:
http://puu.sh/5uecH/7ebfd0f356.pk3Punk Buster patch:
http://puu.sh/5ue9u/fdc2a53552.zip