yes do, is "normal" sabayon tried to put "boot" in a true boot partition (/boot NOT /), as Gentoo...,and the system in a root partition, TOO SMALL!
you made an erroneous partition scheme.
please remade, you may use this.....
sda1 is your windows partition..... good, remain in this manner, dont touch partition.
Simplest Scheme ...Made:
sda2 an root-bootable partition......, called "/" mount point may be obrigatory, /... this will be the boot-root, system partition, example 200 giga.... (PLEASE NOT USE 100 MEGA)
sda3 a home partition for your data,,,,,, mount point will be /home....this is for videos, music and configurations (placed here automatically during installation)example 600 giga...
sd4 a swap exchange partition... is sufficient small in new comps, maximum 4 giga. in my 500 HDD is only i Giga, may be also smaller as 700 mega, 512 mega....
The system, sabayon, may be installed in the /, sda2 Obrigatory, not install in /home neither in swap
If you want to use a separete 100 mega /boot partition, you should use LVM , extended, or remove the /home or the windows partition a HDD only accepts 4 partitions
Resuming for use the 100 mega /boot, you SHOULD have an additional /, (/root) in wich the system will be installed.
THE ENTIRE SYSTEM SHOULD BE IN THE /, ROOT-BOOT PARTITION, THIS SHOULD HAVE MUCH MORE THAN 100 MEGA....
ALBERTO FEDERMAN NETO
Favorite Distros: Sabayon, Gentoo, Mageia and OpenSUSE