How To Make Textures?

[Nitroboy]

I took pictures and stuff of the textures, but I don't know where to go from there.
Here are some (note: I did these in a hurry so they might not be that good):

[jitspoe]

http://digitalpaint.planetquake.gamespy.com/testwiki1/pb2wiki.php?word=Creating+Custom+Textures

[stigma]

i made 3 new grass textures them grass textures in paintball are horriable looking these are my own personal textures  that i made with psp7 you use them and you have my permission use them anyway you like or edit them as you like

http://www.kingpinforever.com/cujodesign/grass.rar

if need help with texture makeing if have msn# or email added me i can help
stigma3@sbcglobal.net

[Nitroboy]

Thanks