how to change key mapping? and include parts in assembly file?

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Hi,
I just started working with Inventor 2015 (as a student), and i have a few questions about the program.
By default shift+mouse wheel gets you in orbital view mode, and mouse wheel only gets you in panning mode. I'd rather swap those controls, because i'm used to have it that way, and because i think it works faster that way. I can't find an options page where you can alter such settings?(or create shortcuts for them) I have additional mouse buttons on my mouse and i'd like to use them too.
For the second thing, i think there's only a third-party solution.(if there is any)
If you create an assembly, you always have to keep in mind the locations of the included parts,(and not to delete them) you can't rename them etc.
so if it's possible, i'd like to include them in the .iam file so i can use that as a stand-alone file, that way they're less likely to get corrupted, too.
If someone could help me with these things i'd be really thankful.