Hi Ben,
I have been working on the plug-in and related topics and away from this forum for quite a while. Sorry this reply is so long in coming.
There is a new release of the MetaStockCSV Plug-in. Please download and install. If and when you have problems implementing your own .csv format files let me know and we'll get it running. The new version is much more adaptable and powerful. Please let me know.
Thank you