SAMI Doesn't work for that, it only instals a mod, if you put in a custom name, then that's only for the uninstall mod function, not in the game.
Yah, I would avoid that program if I were you... I started out modding using that program and found it too damn flaky for my tastes. The Notepad feature doesn't work worth a shit for one thing. I made the mistake of doing something with the Trainer feature (despite its warnings) and it really lunched my system - to the point where I had to do some serious registry hacking to fix the problem! Other things were too hit-and-miss for me. Stick to other programs that do the equivalent.
And here's a tip I meant to include in my first post: In GXT Editor, make sure the 'Remember names in .INI' option is checkmarked. This will keep track of names you've found and changed so that the next time you run the program the labels are displayed right away.
Luckely i didn't had that, here it was only that the game wouldn't launch and that all the cars and people disappeared.
I found out my problem with GTX Edit, it was that american.gtx was on read only, I made a back-up, saved it wrong, but now I turned of read only and it works.