PCUI Application to be viewed externally

Hi,

we have a requirement for which a PCUI application seems to be the best fit, i.e. (Search - Search Result - Detail) type of screen. However, we do not want to link this application to a Portal, instead we would like to make the application avaiable to some external Third Parties (Stateful logon). We will not be building an external portal either, it will simply be a link to a BSP wrapper which launches the PCUI BSP application. My question to all of you is, firstly, what would be the best approach ... a wrapper around the PCUI applicaiton with the appropriate logon? Considering the CRM_BSP_FRAME is a generic BSP which will hold other internally sensitive PCUI applications, what other security implications / requirements are there?

I look forward to your responses.