Evil_Echo : You really should patch ArmA up to 1.14 if you want to use ACE.

ACE should autoinstall into it's own folder in the modfolder style. So be sure to include -mod=@ACE on your startup or better yet use one the the ArmA launchers to manage your mods for you.


[edit]
oxy_moron:

ACE is aimed more at multiplayer. You can use it for solo, but some of the SP missions that come with ArmA are not totally compatible with ACE - the helo missions in particular don't like ACE's vehicle startup sequence. So do concider either crafting your own SP missions or getting ones that are ACE-compatable from sites like this one.

Yes i noticed about the vehicle startup procedure.Here is what happens
I start a mission,board the ah-1 and i get mission failed message every time i try to start the engines and there is no way to complete that mission without flying in a helo.
Is there any fix for this? I have arma patched up to 1.14 and ACE 1.09