> One of the main and mandatory feature they cannot renunce is the possibility
> of displaying every attached image just inline, without having to click over
> the file name or to enter the entry view (in which the attachment can
> already be displayed inline) ...  

Displaying images in the list view is possible by going to the "Find" page and
checking "Display full entries" and "Show attachments". This can even be
automatized by putting

Start page = ?mode=full&attach=1

into the configuration file. 

> - images (and hopefully ps, eps, pdf) be displayed inline just after the
> text body of the message in the main "List" view

PS, EPS and PDF files cannot be displayed inline by the browser (at least not
the browsers I know). I guess what you want is that users submit PDFs, and elog
should convert the PDF automatically into JPG and display a reduced version of
it. Unfortunately this is not possible, and it never will be, since one of the
design prinicples of elog is to be independent of any other package, and with
the requested functionality you would need lots of helper functions (like
ghostview, pbmtools, etc.) which some of which are not present under Windows.

> - possibility to configure the scale of this view
> - possibility of build some thumbs in order to save BW and time

Using a HTML <img width=100 ...> does not help. The image is then shown in a
smaller scale, but still the full picture has to be transferred. For making
thumbnails, you again need external libraries (see point above).

So if you want extensive image processing, you might be better of with a picture
gallery like applications, but maybe the automatic attachment display shown
above helps a little bit.