well, if you can upgrade to kernel power 47 then thats all you need beside bleeding edge you don't need uboot
i updated from 46 to 47 through pali's thread (http://talk.maemo.org/showthread.php?t=71879)
and i think i read somewhere that to use kernel power 46 with bleeding edge you need some stuff too but i can't remember what was them.
so first thing to do is follow the thread and upgrade to 47, don't install uboot if you don't need it, i switch between stock driver and bleeding edge by the wlan driver applet or you can do it manually.
and remember :
Do not install kernel-power-bootimg unless you are using nitdroid
Do not install kernel-power-headers