I want to report about succefull installation themes from OS 2006 (exactly Gray and Red) on OS 2007.
For installation i add Nokia official repository with 'mistral' component in to Application Manager.
After installation everething work and look fine, except icons in apper side (brightness and volume regulation, etc). Its looking like with cutted downside area. Seems that area in OS 2007 a bit bigger. BT icon in theme Gray looking with reduced colour range.

P.S. also i tried to restart device, it reboted without any problems.

For me main reason for inslalation was to have a previews layout of clock and rectangle windows.