Download the file and extract it to
/etc/bootsplash/themes


then remove the simbolic link
/etc/bootsplash/themes/current and point it to the newly created folder
$>ln -s /etc/bootsplash/themes/LinkareCrystalEnterprise /etc/bootsplash/themes/

Then open your /boot/grub/menu.lst and check for a vga=791 option in your kernel... Something like this:

kernel (hd0,4)/boot/vmlinuz BOOT_IMAGE=linux resume=/dev/sda6 mem=2048M splash=silent vga=791


Also, edit /etc/sysconfig/bootsplash on mandriva to get it working everytime you update your kernel to have a line like
THEME=LinkareCrystalEnterprise

Then update your bootsplash in the initrd code by running
$>/usr/share/bootsplash/scripts/make-boot-splash /boot/initrd.img 1024x768

and that's done... reboot now and enjoy