Two things to say here:
1. Feel free to Skype me anytime for help with modding. As I've said, the only parts that scare me are custom modules and skinning. Apart from those, I can help with pretty much anything you need. Skype is fair_strides, btw.
2. As for you last part about having to enter the module from a save before you ever went there, that only applies to editing the .git, .are, and .ifo. Anything else, not really. The exceptions are if you changed/added something that is only in place after an event you've already done. An example is making a script that spawns an item, but having the script activate when you talk to the Serroco Leader in the Refugee Sector on Nar Shaddaa, only you killed him already. You'd need a save from before killing him, not necessarily from before entering the module.
As an aside, if you want somethin to happen when you enter the module, you can always rename the OnEnter script, make a script with the original name, edit that, and add the following line:
ExecuteScript(<New name you gave the old OnEnter script>);
This will allow you to edit what happens when you enter the area without affecting the normal events.