I have created 8 separated databases and all are published to the web no problem. The issue I am having is that I want to have more than one database open at the same time.

I have a master database that I wish to have open at the same time as another one (or several) in order to perform some questionnaires.

The problem I am experiencing is that once you open a 2nd database while the first one is already open, it overrides it and the last opened database will replace the first one while working online with instant web publishing.

Any idea how i can have more than one database opened via the web to work on several at the same time without loosing information in the previously opened database?

I think what you're saying is you want to have more than one *window* open, and that's not possible in IWP.

However, it's fairly straightforward to script your navigation, i.e. build scripts that go to the desired layout in the desired file, and add buttons to your layouts that perform those scripts.

If you need to see the information from two windows side by side, you'll have to put related fields from file B on a layout in file A alongside the fields from file A.