PE Loader Questions

[gigaman]

1. You don't say if you're talking about raw offsets/sizes (yes, the sections can overlap that way) or virtual addresses/sizes (I don't think they can)
2. Yes
3. Again, you should be more specific about what exactly you mean; gaps in addresses (probably not), gaps in raw data (certainly yes), uninitialized data at the end of sections (yes, those zeroes can be executed)