I have downloaded the 7 maps and SimHQ O.N.E.

Where does all this go?

Never mind ... found it in the readme file:

INSTALLATION

1) Drop the entire "@SimHQ_ONE" folder into the root of your Arma 2 folder.

2) If you do not have Community Base Add-ons (CBA) installed, place the "@CBA" into the root of your Arma 2 folder.

3) Each map folder should be added into the root of your Arma 2 folder. The seven maps are: Duala, Kibrul, Panthera, Podagorsk, Sbrodj, Sahrani, and Thirsk.

4) Modify your Arma 2 shortcut (or create a new shortcut) that includes the following at the end of the TARGET line:
-mod=@CBA;@SimHQ_ONE;@Duala;@Kibrul;@Panthera;@Podagorsk;@Sbrodj;@Sahrani;@Thirsk

yup, just install it like you would any other mod

Can we not do an @Maps folder with all of the islands? That makes for one huge target line to manage.

You can, but you'll need to be sure to repack all the .PBO files from each map into the single "addons" subdirectory in your unified folder.

If you know what your doing you can just use 1 mod folder for the lot. I've just got one @SimHQ folder with all the stuff needed to play on the SimHQ server inside

Also, you can use the "expansions" menu bit in-game, no need to mess with shortcuts etc etc

For legal reasons we cannot distribute it that way, but you can definite make it that way locally.

I have everything installed and I am able to log into the server, but how can I test to make sure all the maps are working properly?

choose a map from the list in the middle, then choose a mission from the list on the right, and start it. If it starts without any errors then you are set for that mission and map.

Just load up a mission on each map. Choose a slot and let the mission load to the brief. Then (after voting yourself admin) just do a #missions in the chat and load another mission on the next map.

A good mission to test the ONE content is "Invasion" on Takistan.