First no airport, then no network preferences available

[hamistar]

Hi!

My problems are getting bigger and bigger:
1. I could not activate my airport card after installing 10.6
2. I erased all data in system configuration as other threads told me

http://discussions.apple.com/thread.jspa?threadID=2140025
https://forums.macrumors.com/threads/777038/

3. Then my MB said that there is no airport card installed (but it is)
4. After that I tried to reinstall 10.6 but DVD stopped loading and said it interrupted
5. Now I´m even not able to open network preferences! It loads, and loads, and loads...
6. I installed 10.6.1 but nothing happened

I feel like snow leopard (and my attempt to clear the situation) killed network on my MB-Pro.

Does anyone have an idea? HELP ME PLEASE!

Best regards,

Hami

 

[hamistar]

I found out how to solve this problem if anyone else got the same...

1. I copied old system prefeences using time machine
2. I solved problems regarding access authorisation
3. THEN I was able to install 10.6 again

Now it works.

Regards,
Thomas