Quotations

[Gerben Wierda <Gerben.Wierda@rna.nl>]

I use \startquotation and \stopquotation a lot. I would like to  
visually strengthen the quotations because some are pretty lengthy  
and a reader might forget that it is not me that is writing here. I  
have been thinking about applying a light grey background or a border  
of sorts (which should then be open at the top of bottom if the  
quotation flows over a page boundary. Can someone tell me how to do  
this?

Thanks,

G