The best way to realise the potential of any new aircraft or objects within single missions, is through the Full mission builder, either by creating your own missions or editing missions you already have from another scource.
This may sound difficult but it's actualy really easy and quite alot of fun. Best way to find out hown that I've seen so far, is this tutorial
http://www.jumpintojapan.com/index.html
After that you can use some of the "aftermarket" mission utiils like Mission Mate
http://airwarfare.com/Sims/FB/fb_essent ... es.htm#028
Uberquick
http://www.uberdemon.com/
QMT
http://www.airwarfare.com/phpBB2/viewforum.php?f=21
QMT is not yet updated to be fully compatible with 4.04 but there's temp fix for it and that will be officialy updated soon , I hope.
There's a learning curve involved withe these tools too, but they include good tutorials.
Any maps you see for downloading are simply intended for printing out and having beside you to use as navigation aids, and can be easier to use than the ingame map. There is no place to put them. Maps (theater's) that are added to the game via patches for eg., are accesible through the Full mission builder.