Last night after Kim went to bed I continued to work on her navigation problem.  I started guessing alternate street names and got a hit in a city just outside of Santa Cruz.  The street Kim was to take as an exit off of highway 17 was close by so everything matched.  Kim apparently misunderstood the street name.  She had one letter wrong.  I sent her a message on her cell phone to call me before she left.  She called me a few minutes ago and I gave her the MapPoint directions which avoid I-80/880 through San Francisco which Kayla had given her and instead routed her south on I-5/205/580/880 to highway 17.  We also discussed how she should leave the GPS unit on to enable back tracking should she need that and finally I gave her the lat/long of Kayla's house.  I think I have prepared her as best I can now.