I label this problem things you missed when you didn't read the tutorials.
first read this
http://www.linuxforums.org/forum/viewtopic.php?t=19561
and notice this
"Worth noticing is also, of course, that a USB Mouse won't work without USB-support.
Check your kernel-config for usbcore, usb-uhci(or ohci, or ehci) and hid."
hmmm still reading
this next
http://www.linuxforums.org/forum/vie...=100027#100027
k after that
http://forums.gentoo.org/viewtopic.p...cdff2fe7a38709
then
http://forums.gentoo.org/viewtopic.p...7365d76dc2b4be

now moving right along how to recompile/compile a kernel
http://www.digitalhermit.com/linux/K...ild-HOWTO.html

I remember giving you the first 2 links above and saying READ, you didn't READ. Reading is good for you it saves you posting a problem you didn't read for, why do you think the tutorials were made obviously not for their aesthetic appeal.
emerge -s read
emerge read