Peter Pig do a set - Regiment of Foote - that is quite good but has possibly the best set-up section that I have seen.
It's called the campaign section, but only takes a few minutes and decides who is attacker and who is defender.
Interestingly it's possible to finish the "campaign" with an attacker that is heavily outnumbered by the defender.
The rules work on a points system and both players start with 400, but I've played as attacker with 350 vs a defender with 450, I've also attacked with a reduced force and no artillery (stuck in mud on the way to the field)
http://www.peterpig.co.uk/rules.htm