Yay ty all.

Vistualbox, SDK Lucid, your comments, some google and now i can use "make menuconfig"

As far I know, make menuconfig (the first time) will load the default configuration. I would like to use the original config from kernel-power 52, so I download the .deb, extract it, extract zImage-2.6.28.10-power52.fiasco wit 0xFFFF, now I have a kernel_2.6.28.10-power52 file.... maybe I'm dooing something wrong :P? Where I can find the original config of kernel_2.6.28.10-power52? or maybe is the default one?