Hi;
There's a step-by-step tutorial for setting up mod folders here, and using Kegety's mod manager:
http://www.armedassault.info/index.php?gam...s=faq&id=34For creating your own AddOns you'll want to download the tools suite from BIS:
http://community.bistudio.com/wiki/BI_ToolsThe BI Wiki provides a lot of information on using the tools:
http://community.bistudio.com/wiki/Main_PageYou might also want to try some of the tutorials on BRSSEB's site, while these are designed for OFP, they do still work in ArmA:
http://ofp.gamepark.cz/_hosted/brsseb/tutorials.htm(You won't need to concern yourself with the setting up tutorial, as the ArmA version of oxygen does this with an installer)
You can also download all vanilla game models (well... most of them anyhows) in MLOD format, which allows editing with O2:
http://www.armedassault.info/index.php?gam...news&id=558