1- Before initiating the installation, it opens a terminal and it writes "diskutil list" to see in that disc is going away to install Leopard.
He appears the following thing:

leopard: diskXsY
(X is the disk number and Y is the partition number on which you installed Leo)

Example: Leopard: disk2s1

2-Installs leopard with the option MBR-efi.

3-If the last minute stops the installation, reinitiates.

4-It starts again with dvd of Leopard, presses f8 and - s

5- cd /usr/standalone/i386

6- write: ./startupfiletool -v /dev/diskXsY ./boot_v8

Example: ./startupfiletool -v /dev/disk2s1 ./boot_v8

7-It reinitiates... and all perfect one

... sorry my english