i wanted to practice flying on single player but it only has the option for 16 player maps.is there anyway to change that or practice flying?

just create a muliplayer server and add the maps you want to practice flying on. I think theres a mod though that let you play 64 player maps on sp.

And at tweakguides.com they say there may never be any 32-64 player maps for singleplayer cause they say EA may never take the time to to make Waypoints for that many bots... plus the strain it would put on your system even if you didnt add anymore bots your system would have to create all the extra resources for the extra space for the maps...