Thanks to Kaeloree's gracious efforts, we now have a BG:EE compatible copy of XanBG1Friendship.
I have tested it myself on BG:EE, and I believe the English version works perfectly.
(I consider it still in beta, because it uses a beta version of Weidu installer, just like Neera Expansion and Margarita NPC and Helarine NPC and other mods do. But it shouldn't detract from your enjoyment of the game).
The link is here: http://mods.pocketplane.net/kulyok/XanBG1Friend_v7.zip
Unpack the mod into your BG:EE directory, and run bgee_install_xanbg1friend_setup.bat to install, reinstall or uninstall it.
To install the mod in French, German or Russian, open "bgee_install_xanbg1friend_setup.bat" with a text editing program, and replace all instances of "en_US" with your language (de_DE, fr_FR). Save and run the .bat as above.
I recommend backuping override and lang directories, your baldur.exe and your chitin.key before installing ANY mods. It's good practice for all IE games.
If you're in trouble, please check CamDawg's instructions for making your game BG:EE ready:http://forum.baldursgate.com/discussion/6950/player-how-to-getting-mods-to-work-on-bgee/
Or ask questions here or on the mod's forum: http://forums.pocketplane.net/index.php/topic,24286.0.html