i got linux kernel from netfilter.org that version name is 2.6.18-xx & 2.6.21-xx . i use "make menuconfig" and looking in the kernel modify menu that it blank all option select.It's difference with v 2.6.15 (i modify 2.6.15 that menu selecetion that checked default)

Help me.!!
1. i don't know to select menu modify in v 2.6.18 & 2.6.21
2. What 's the default selection of linux kernel.