.ipk or .tgz on openPLI 3.0

Is it possible to install a .ipk or a .tgz plugin or addon on a openPLI image?
I would like to install m2k movie streamer

Quote from andy ray

plugins,software management,install local extension,memory/tmp

Where is the tmp folder on the openpli image?
That's where to put the .ipk..right?

Quote from andy ray

var/tmp i think

How about var/volatile/tmp? Can I use that?