i would like to put on some cool screens but i dont know how help me???!!!

k i want to put some cool screens up and stuff but god i dont know how i have picasa or if anyone could suggest something better (thats free) that would be cool just post all your stuff on this and i will read it once or whenever a day so please help me i got some cool pics.And if you do put on somethin about how to put it on this site please explain to the finest detail i just wanna post lol but im dumb so help me out please!!!!THANK YOU!!!!

MS Paint, open pic, scale down, save as jpeg or .png, www.photobucket.com, upload, copy img tag, paste away