[ Thanks to finid for this link. ]
“It should not come as a surprise that this edition of
Linux Mint uses the same installer and follows the same
installation routine as other Linux Mint editions based on Ubuntu
Desktop.On a test system that I attempted to install it on, on which I
was already dual-booting Linux Mint 11, the main edition, and
another copy of the same LXDE edition, the installer did not seem
to detect that both distributions were Linux Mint.