Which ipk of unknown origin are you referring to?
I am referring to the ipk you want to install, while we have that plugin in the feed.
ipk's downloaded from forums are often made for other non-compatile images, poorly constructed, missing dependencies, contain the wrong files (causing a misery when trying to remove them) or are simply build for incorrect architectrures of library versions. And it may be changed by whoever packaged it.
So if you we provide the plugin in the feed, use that, so you know you are getting the correct (and untampered) one. If that is an old version (because we don't tend to update anything in release versions to maintain stability), simply ask us to look into it and we'll do. Instead of trying to hack your way around it.
And here is no plugin called installipk, and there has never been one.
You can install ipk's by putting them on an USB stick and plugging it in, or install the software management plugin and use its manual installation function.
So, there is no plugin called installipk? Are you sure? Well, take a look at this screenshot and tell me what you see. From the OpenPLI 8.3 feeds.