Hi Platanim - welcome.
You can use the original AFCAD with FS02 - AFCAD2 will only work with FS04. There's a little more compiling work to do with it but it'll do the job of putting in grass airstrips.
Also, you could download the add-on terrain mesh for NZ from the downloads section - it'll make the topography better than the default.
You can also use a program like RWY12 to put in miscellaneous objects like piles of crates, drums, light aircraft etc. You'll find AFCAD and RWY12 easily by googling.