At the first you must download the [Pisi Linux minimal ISO](http://sourceforge.net/projects/pisilinux/files/1.0/minimal/). When the download is done, you can install the Minimal ISO in the Virtualbox.

After it was ready open in Pisi Linux a Terminal and type:

sudo pisi ur

when the Repository has updated (the command ur is "Update Repository")
can you type the next command

sudo pisi up
(this command means upgrade)

after that you must

reboot

When your Pisi Linux System has start again in the Virtualbox open a Terminal and type:

sudo pisi it -c x11.server
(this command says install complete, also the package x11.server has more than one package)

give now the following command in the Terminal in

sudo pisi it xorg-video-vesa

and type further in the Terminal

sudo pisi it xorg-video-vmware

after it give you the next command in

sudo pisi it xorg-input-vmmouse

the best way is this to give in the commands step by step as next

sudo pisi it xorg-input-evdev

then the following command

sudo pisi it xorg-input-kbd

after that give in

sudo pisi it xorg-input-mouse

then the next commands

sudo pisi it xkeyboard-config

sudo pisi it xinit

after this command you can install the Desktop of your choice which one you like (here as Example Mate)

sudo pisi it -c desktop.mate
(here found you again the -c command for install all what Mate need)

after it comes the two last commands what you must give in

sudo pisi it xdm

and as last command

sudo pisi it mdm

with the last command have you installed the mdm Display Manager and now you are ready and as last do

reboot

After the reboot change at the login screen your session to Mate login and have a lot of Fun with Pisi Linux