AR2 version 1.1
 

I have AR2 version 1.1 does this work with NEO 2 or do I need version 1.3

you need version 1.3. I have heard that you can patch your games with NAPALM and that then works with v1.1, but better to get v1.3. £25.00 from
http://www.thinkprice.com/acatalog/Online_Catalogue_PS2_Modchip_4.html#ps2
when in stock or
£26.00 from
http://www.business-ecommercesoftware.co.uk/business/svpcomm/index.html
£1.80 delivery.

The choise is yours.