I think u will need to telnet the box and install it.
try looking for software manager if your box has it press blue button.
I don't have a solo box so I cant help to much with installing plugins on it..
or wait for a little bit and someone might tell u how to install the plugin or whare to look..
with my box I go to plugings software manager and then instal local file. but u need to ftp the file to tmp first if u rebooted the box the file will be deleted. i think think if u don't know how to install a plugin u should not continue or try reading up on how to install plugins on a solo2 with pli

as I say hopefully someone will tell u how to install it on your box

someone will tell u soon I hope its not hard to do it buy telnet but best u read up on how to do it first..