The notion that IWP doesn't support container fields isn't quite accurate. Viewing container fields is supported; you just can't edit them. So if you wanted to have some users update the containers via the FileMaker client, and then make those containers available for viewing via IWP, it's one option.
Another possibility is to use 360Works's SuperContainer product (http://www.360works.com/supercontainer/). This application bypasses the normal container fields by programming a web viewer to behave like a container field, and is fully compatible with IWP.
If those don't suit, you can use the Custom Web Publishing capabilities to do this. There's a containerBridge.php file that comes with the examples in the FileMaker Server PHP API install you can use to extract the contents of a container field and publish it to a web page. For updating, you can use the Insert From URL script step to load the document into your database (see https://fmdev.filemaker.com/message/90621#90621 for details).
It is very helpful information.
Thank you for your prompt reply.
One more thing that you might find helpfull. FM Server 12 can support custom web publishing if you choose that route, no need to upgrade to FM Server Advanced. Also, only one seat of FMP Advanced is needed for each person developing in FM. If you do much design work you could benefit from a copy of FMP Advanced, check out the additional features on the FM website.
Thank you for your reponse. Your information is very helpful.