Concerning _Rat Shack (Pro) scanner_, Scott Hoffman said to All in SCANRADIO:
 SH> know are most definately valid frequencies because I get them on my
 SH> other scanners..) So far it has done this for about 900 frequencies
 SH> I've trie to enter manually, (oh, and the LCD give me an  "ERROR"
 SH> message).. Whats up?
Assuming they're within the Pro-50's rather limited frequency ranges (e.g. 
you're not trying to program 800MHz or something), you shouldn't have a 
problem, the next thing that comes to mind is a processor fault.  Have you 
attempted entering a frequency that the scanner would accept and then doing a 
direct search down or up to your "valid frequencies"?  With a little fancy 
squelch work, you can stop on the desired freq and then put it in monitor 
memory, then transfer it to the desired channel.
... AH SAID *HOLD STILL* YUH GRANDYLORD IMPARSONATIN' VARMIT!
--- JetMail 0.99beta22
---------------