I'm trying to develop a survey that gathers unique personal data from logged in members, such that I can ongoing-compile large data for statistical analysis, yet have them still be able to come back in a month/year and re-edit their own responses.

Site is cassia.org, which is information about lyme disease treatments, with some 9,000 unique visitors/mo. -- The mission is to gather a base of response as to "what worked, what did not" (and under what circumstances, etc.

My desire is to have a unique login section where they will be able to post this data -- while still being able to come back and change it over time. And, as such, I desire to never close this survey. Secondly, rather than to have them respond by email (which will already be vetted in the login section) I desire this to open a frame page, without the use of the email invitation.

Can these things be accomplished (either within LimeSurvey, or add-on)? As a new user, I don't see login info; but I can always get this through third party -- Drupal, Joomla, etc (albeit swatting a fly with a hammer.) Still, I've been working on this project for five years, looking for a solution until I came across you this week.

Thanks,