id guess this is reference to using the sd card …
(ive never heard it called an extended drive though)
if so, id say, enjoy the organelle just using the usb stick for now… hopefully a new image will be released soon, that will make it easier to use the sd card, then you can consider this option.
one thing, if you are using the tiny white USB stick that used to come with the Organelle, Id recommend you replace this with a new one from someone like SanDisk ( get a 8 or 16gb one) … the white one has proven quite unreliable for some, and when it fails, it can lead to a frustrating experience.
something like the one C&G now sell (but you can get elsewhere easy enough)
LADSPA, yes your assumption are correct, there is an ‘installer’ which you download and run as you would any other patch (however, once run, it can be deleted)… then you can run patches that say they require LADSPA.
(if your using the usbstick this all should just work, there are issues with the installer when using the sdcard, but as id said, id hold off on that for now anyway)