Xavier. The fonts in Photoshop Elements are populated from Windows (Or whatever similar program you are running on your computer). If you go to the hard-drive in My Computer eg C:>Windows>fonts, you will see what is available. You can obtain new fonts from the internet or from other computers running eg XP or Vista which will also have a few different fonts.
Once you are in Windows fonts you will see how they are organised - just lift and drop the new ones in and if suitable they will then appear in the Elements list. There is also a lot of help for this process on the Internet. Hope it helps John