Hey guys, thanks for all the assistance. It definitely is the 1.1 patch thing - it's been such a long time since I had to install BF2 again, probably a few years, so I just forgot all about that!
However I found out that there are a few patches out there and some may not work for some people. For me in the EU, I couldn't use the 'Domestic' patch.
My disc is a DVD so I had to use the International DVD version, so for anyone out there getting the message
'Wrong disc inserted. Please insert the original Battlefront II disc'
It is because you are using an incompatible patch. Make sure whether you are using a DVD disc or a CD-ROM, and also whether you are in the US or outside. Then choose the appropriate patch here:
http://www.lucasarts.com/support/update ... ront2.htmlThanks everyone and I hope my experience will be useful for others
Azriel