Keybings Help.Follow

Hello everybody, as you can see I'm a noob on this forum.
Yeah, I took a look at EonSprinters guide, he determined me to make some changes in my gaming style, but I have a stupid question for most of you but important for me nonetheless.How could I switch, ONLY INGAME, the mouse buttons, so I could turn on the LEFT mouse button, and turn the camera on the right one.The keybindings don't help me, and I don't want to switch the mouse from control panel either.
It's much more accurate for me to turn on the left button, I have more control etc.
And another little question, I will have any problems later with abilities keybinded on keyboard and not on mouse scroll ?I can use most of the buttons near WASD because is very natural for me after playing 3 years of DoTA and using every single hero spell trough keyboard.
Thanks in advance.

I have no experience with addons and will cripple me a lot in my work at pc if I switch them from the mouse settings in the control panel.Any ideas of addons ?

I have to agree that it's the easiest method. Make yourself a shortcut on the desktop that goes straight to the Mouse properties in the CP. It really will take you an extra 15s each way. .. That's seconds, not silver. ;)