[Babul]

the objects are shipped within the 0.3c-archive you downloaded. its the custom.img file. you only need to know their IDs, and maybe, if you intend to map with them (what else? lol), then the gamerx wiki should help a bit getting started to map with MTA:
http://forum.gamerxserver.com/forumd...MP-%28GTASA%29
1st topic^^^