Inserting an SVG image into an OpenOffice document (.odt) took me more time than I expected. Looking back, this is what worked for me:

• Download SVG import extension (License: LGPL)
• Install the extension (Menu > Tools > Extension Manager)
• Convert to .odg (OpenDocument Drawing) using OpenOffice Draw:
  • Open the SVG file
  • Save as ODG
• Insert ODG picture into text document (Menu > Insert > Object > OLE Object... > Create from file)