YellowDog dialup trumped??

   I have a G3 iBook running YDL 2.3, which I configured at home to use 
an apple airport base station (their wireless hub) on a DSL connection. 
Now I'm elsewhere with a dialup. OSX on the same machine, whose wireless 
data I copied manually into YDL, still keeps the option of using dialup, 
and works fine (except of course for the fact that it's a pretty pale 
imitation of linux, and subjects me to the One And Only Apple User 
Interface (OAOAUI -- a howl in the desert to me, whatever it may be to 
apple addicts).

   But the YDL configuration, following the manual and the update to it 
in a ydl.net howto, put the dhcp data into bootup and made it default. 
Is that why I get nowhere (i.e., only as far as "initializing modem" 
followed by a report of failure) trying to use kppp a/o wvdial to get it 
to make do with the only connection available?

   Is there a fix somewhere? One I can follow? Keep in mind that I have 
a most barely enough idea what I'm talking about to state the problem -- 
if I've managed that ....