[Michael P]

Yes, that is what the IPS system can let you do.

Without knowing what the errors were, its hard to say what the problem might have been. If its a fresh install, I'd try reinstalling it.

Since I don't know the extent or type of modifications you are talking about, it's hard for me to say. I would think you could use them, but you may or may not have to make some changes depending on what your mods were.