As I don't know what your actual language is, I try to explain it as clear as possible in english

You can insert images by putting them into the notes, either using copy and paste or via drag and drop. To mark them as an image you use following syntax:

[["The images name"-"image"]] (each without the quotation marks)

Then mark the position in the text where the image should be included as follows:

[["The images name"]] ((also without the quotation marks)

Lastly, you need to enable this link during export. For this, open the exporter, scroll to the bottom and check the option “Connection to notes.” Also make sure “Pictures” is enabled in the table below.

This process is also described in the third Screencast:

http://www.the-soulmen.com/ulysses/screencasts/?nr=3&lang=en