here my question im a bit newbie in gmax

but i have some skill for making 3d model i have made some eod model and scenary and texture for cfs1 and cfs2 but im new in model.
and im making a fuselage of a (oldy biplane 1927 a Levasseur PL8) whit gmax my wing is done and im now beguining the fusselage hall go good.
1 : what is the best tool for making a fuselage.
cross section or cylender ???
i have a 3D view of the plane whit 5 cross section view so i think cross section its the best way but
i have to know ?
2: if i make 2 section. what is the trick to merge the 2 section perfectly ?
3 : it is posible to join 2 section whit vertex joingning 1 vertex whit an other vertex etc etc ...whit ligne.
then puting poly on it ?
i have made that whit an other mesch editor but in gmax ?
4 : it is possible to make some new vertex point on a section exemple for making new side ? your helpe will be exeptionaly apreciate.