It is more complicated than modding, you need the software XSI and it is quite complicated when you don't know the basics of XSI, and you need the pandemic exporter wich comes with BF2_modtools, but that exporter only work on the XSI 5.0, 5.1, 5.11, which isn't avaible anymore but you can always do it in XSI modtools wich is free, but you'll need to send it to someone for him to export. But for that you need to know how to animate in XSI.