My 4100 has the IDE header. It shows pin 1 and pin 2 and doesn't say ISP anywhere near it. It does look as though some of the tracings lead from the flash to this header. I tried to use a USB/IDE adapter but my laptop never recognized anything. I did the hard drive bit too, but like an earlier post stated, the system just wouldn't boot.
I do wonder if an IDE Flash Module would work.
http://ec.transcendusa.com/product/p...=59&indexnum=9