Can any1 help me with some kinda tutorial on makin my own custom scenery?

Its a long process, and one which has got me half way there.

First of all you need a 3D design program, like 3DS Max, or Milkshape.

Once you have this, let me know and i will carry on :P

Head over to this thread
http://forums.rct3x.net/showthread.php?s=9e5ab&tid=1312
It has links to tutorials to teach you how to make custom scenery. Send Jag100
a pm, he has done and made some custom scenery for rct3. I am sure he would give you some help if he has some spare time.

I have maya 7 personal learning edition.

^maya is one great softwere to use. also if you need any help importing then pm me or you can post here :P

I have had a go at custom scenery, but i am too busy to fully complete a set

so do I just make something, like a wall and then get ur help on iporting it?

yep

:!: I downloaded some custom scenery from a few sites in ur link jag but I dont know where to put them. Help?

Put theme in Presario ©/Programingfiles/Atari/rollercoastertycoon®3/style/themed and then onpen the scenery and press unzip