2008 2.4GHz with WiFi problems

Can anyone point me to an old discussion for the wifi card on the 2008 2.4GHz MacBookPro or point me in the right direction?  My wifi card keeps loosing connection and freezing my computer (black screen).  All the system preferences are already set to never (computer sleep / screen sleep).
Thanks!
  Model Name:          MacBook Pro
  Model Identifier:          MacBookPro5,1
  Processor Name:          Intel Core 2 Duo
  Processor Speed:          2.4 GHz
  Number of Processors:          1
  Total Number of Cores:          2
  L2 Cache:          3 MB
  Memory:          2 GB
  Bus Speed:          1.07 GHz
  Boot ROM Version:          MBP51.007E.B05
  SMC Version (system):          1.33f8
  Serial Number (system):          W8849DC01G0

Which wireless access point or Wi-FI router are you having problems with? Maybe someone has had and fixed the problem before.
As far as making changes to the wireless setting, not easy, although you could check the Advanced settings under Network prefs, although I guess you've already seen that there isn't much to change here.

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    null
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