[eluser]ggoforth[/eluser]
This is a good question...I'm not positive, however I can offer the following Logic:
If your calling a method called save in the model contact, CI should know it's calling the model. If you were calling a local method "save" you would write:
Your code is clearly calling an external model (or lib) named contact that you have loaded via the load() functions of CI.
So, I think your ok. Again, I might be wrong, but seems like you should be fine.
Greg