The third-generation mobile networks will provide new and advanced services for mobile users: in this context, the Virtual Home Environment (VHE), currently being widely investigated, is a concept which will enable users to access and personalize their subscribed services whatever the terminal they use and whatever the underlying network used. Adaptation is a key feature for these architectures: services should be designed and developed only once, independently of the actual user terminal and its capabilities. In this paper we show how an adaptation framework could benefit of code mobility, especially for services providing multimedia content. The base architecture is shown, and specific scenarios are discussed. Work made in this paper has been done in the context of the European IST project VESPER.