questions about drawing techs

hey, because am starting now, i download 3dsmax 2010 and i try to start, but i have some problems...

i don't know how can i open or make an .x file, and because of this, i don't know how looks like the model of my new tech!

generally, i don't understand how to make and setup the model. Please help me.

Sorry about my lanquage, but i am from greece and i had long time to write in english.