I have all the time in the world to place them since the enemy never advances. what I want is the ability to advance my troop in an orderly fashion like real soldiers without having to command all of them individual they whole time.
I understand how to control them, I just wanted to now if that technique was available and I didn't know. that being said I for one would want that to be an option
Sadly, there is no "lock formation" option to keep them advancing in an orderly fashion in the way that you describe.
The workaround that I use to achieve something similar is
a) put infantry in shield-wall, set to follow me. I then move forward with the infantry until 150m or so out, at which point I either sit and wait while my archers do their thing, or I set the infantry to advance/counter-charge the enemy main body.
b) put archers in loose formation, and manually advance them using f1-leftclick. These are the only units I will manually push forward, and that too only until they're around 125-150m away from the enemy. After that, I either delegate, or put them on 'advance' command.
c) (only works if enemy is stronger or on-par) delegate cavalry command. The cavalry AI usually splits the unit into two, with each new unit protecting a flank. The cavalry advances slowly alongside your infantry, which is what you want. If the enemy is weaker, however, the cavalry will charge right away.