Are these VB scripting files? If so, even if you could get them into RH there is no way to get them back out to ASPX files that I can think of. Perhaps if we understood a little more about why you want to bring RH into the equation we could offer some other advice.
Colum is right. We need more information. Presently, the only way to have RoboHelp generate "native .aspx" files is using a Multiscreen layout and publishing to SharePoint. You will find documentation on this process in the online help topic
Also, you will want to refer to Willam VanWeelden's website where there is more info as well as a recording of a seminar Willam and I conducted last year. Recording of RoboHelp & SharePoint Integration Webinar Now Available | WvanWeelden.eu
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