I suppose you mean Bare-bones Pluggable Module. To use it in a web site running v.3.5 (or later) you need just to
fix the references in your template project for Telerik.Cms.Web.UI
assemblies i.e. you should add a reference to the assemblies distributed with v3.5 (or later).
Do let us know if you need any further assistance.
the Telerik team
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