[Request] Content plugin installation

[Lev]

I would like to have features while installing wdx plugin:
1) to add a set with all custom columns availiable in plugin during it's installation
2) to add sample columns set of columns with their widths recommended by author of content plugin
3) to select not to install custom columns (as it happens now)
I think it can be made with content plugin interface or via pluginst.inf