hey there, and welcome.

Let's do this the quick and painless way shall we

Firstly buy Keyclone software then read the following for each of your questions

1. HOWTo - Set up Keyclones Maximizer (Updated v1.7s v1.7r)
2. be aware that trial accounts cant start groups so it will be hard to work on your macros as such...doable but no perfect
3. Mulitboxing Class Selection FAQ

Beginners Guide 2 Dual-Boxing (3,4,5 boxing) is also a very good resource for getting started it seems (haven't read it all, was done after I started but looks good from what I checked out)