Thank you very much for the suggestion.
In this particular case the website has been built in Kentico using the aspx pages already and now it is required to give more functionality to the static aspx masterpage. I understand the advantages of the portal and that's why I want to give those capabilities to a pre-existent aspx templates website.
If there is a way to give an aspx masterpage the flexibility of having a zone webpart that will solve the problem and if you can point me in the right direction that will be really appreciated.
Thank you very much for all your help.