Problem with metapackage after trisquelizing Lubuntu

Hi, i've just trisquelized Lubuntu, but now i'm being told that the package trisquel-mini is defunct because it needs trisquel-mini-data, which was not part of the install script. Now, when i want to install trisquel-mini-data i'm being told in Synaptic that the package could not be authenticated/legitimated and that it could be dangerous to install it. Do i have to enable a certain package source?
Strange thing btw: I look for trisquel or abrowser with the Synaptic search tool and no result. But when i scroll down the package list, i find them.