Joomfish contentelement gives database errors

[spacialek]

On Joomla 1.5 + VM2 (an upgrade from VM 1.1.9), I installed contentelements provided there http://dev.virtuemart.net/attachments/download/313/Virtuemart2_joomfish.2.1.7.zip but it gives me errors (see attached screenshot). I see why the fields are not found, since they are in the following tables: jos_virtuemart_products_en_gb and jos_virtuemart_products_fr_fr instead of the table virtuemart_products.
I have created a new contentelement which matches the jos_virtuemart_products_fr_fr (see xml attached file) and it seems to work, but I had many problems like loosing the pagination in french so I am really not convinced it's the way to go.
I really need some advice on how to manage the multilingual aspect of VM2 on J1.5, I am completely lost 

Thanks

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