How do you create your own textures to put into your levels?

Well, there are several different ways...

If you mean literally how do you creat them, use a program like GIMP, Photoshop, PSP, or if your desperate, Paint.

If you mean how do you import them into WED, then it is simple. Open up WED, start your project, and click on Texture>Texture Manager. Then, select add folder, and browse for the folder that holds your textures. After that, just hit ok, and your textures are in WED!

What size do textures have to be how many pixels?

Anything with a width or height of 8, 16, 32, 64, 128, 256, 512, 1024, 2048, or 4096. They can be mixed and matched. Above 1024 on a given side is not recommended unless mipmaps are used. 256x256 texture sizes have the fastest rendering speed.

How do you make the texture not spaced out becuase when i run my level it makes some of the textures look nothing like how they should look

?? What do you mean by "spaced out"?

the textures are not the way they should look, they look shiny and they should look striped

I'm still not fully sure, but given the shiny, it's a big clue. The likely cause is that you have the Sun enabled. Add this to your script, within the main function after the level_load instruction:

sun_light = 0; // disable the sun

I don't know how to do that, and i don't thin it's the sun becuase one of the textures worked fine. Should i take a picture of it?

Pics always help.