Something wrong with your music.lua I tried to fix it but i didn't know how xD while playing you can't turf off the song by pressing M. Try to check it,
Last time I fixed selim map for you and him. I won't fix anymore you have to learn. All you need to do is edit meta file. Right click on meta and open as NotePad and edit it as its written here: http://mrgreengaming.com/forums/topic/14734-mapping-rules-for-mta/
cars do change when moving to cp,but only in the cp 2,4,6,8 because i think the author added a car randomizer script to his nts map instead of replacing race to nts on meta.xml.Didn't know about that, lets wait for warp to check it.