we setup three store Store View Name's a long time ago when this should have been Store Name's.

We are now busy rolling out multi-language and this is where I discovered the mistake.

Is there an easy way (and how) to move a Store View Name to a Store Group Name (1 up in the hierarchy)

Website             Store Group       Store View
------------------------------------------------
www.domain.com      domain.com        store1_NL
www.domain.com      domain.com        store2_NL

becomes

www.domain.com  store1      NL  
www.domain.com  store2      NL
...
www.domain.com  store2      EN
www.domain.com  store2      DE
etc

Thx!!