Well, this is for Kotor 1, but still, worth taking a look. 4 links: 2 for species soundsets, 1 for alien appearance, 1 for species "specialization" feat. Take a good long look at the read-me's, because this is still beta. There are some missing animations to some models, and you'll need KSE to update your soundset. But worth a try if you dream to be an alien By the way, big thanks to redrob41 for these wonderful mods!!!
http://knightsoftheoldrepublic.filefront.com/file/Playable_Alien_Species_Beta;100593
http://knightsoftheoldrepublic.filefront.com/file/Species_Specific_Feats;84086
http://knightsoftheoldrepublic.filefront.com/file/Eleven_PC_Species_Soundsets;84050
http://knightsoftheoldrepublic.filefront.com/file/PC_Species_Soundset_Booster_Pack;90121