mod tools can be found below website
you cant
you mod
you cant
you need to mod it. but you could search star wars battlefront ii 212 legion mod and there should be one i used it for myself and its good.
you cant mod ps2 only PC
Yes
http://www.moddb.com/mods/star-wars-battlefront-weapons-reloaded-mod
there is none you have to mod
you cant
hoi
yes (below)
there are alot of maps you will like mod maps