Gsccc summed it up in a nutshell.
Please also keep in mind that even though KotOR/TSL modders are closely tied to PCGM, LucasForums is not. LucasForums & PCGM are owned by completely separate individuals and the rules of one site may not be the same on the other site.
Even with that said, porting a games resources from one game to another game with the intent to release the work publicly is very illegal. However that tutorial was not aimed at porting resources from JO, but rather other modders mods for the users own personal use.
Also please read Holowan Laboratories: Forum Rules and Etiquette (
http://www.lucasforums.com/showthread.php?t=127725)