Own sprites and stuff ... How to make :S

Hi again! I've been posting many threads these days (I became a member yesterday, xD, but still) and now I'm back! Again!

 Earlier when I ahd RPGMAKER a few years ago I found a site where I could make my own sprites and stuff. Also I found a few programs in which you could do the same!

Now I want my game to me a little more personal than to use the ones that already are in the program, so ... How do I do?
These are a few, kinda important, parts I really need help to fix:

• The heroes and the big villains like the final and other bosses.
• Change the starting screen and stuff like that.

here are some charset makers:
http://rmrk.net/index.php/topic,9029.0.html

if you dont want to use them go here and download some pre-made ones:
http://crankeye.com/resources/

also question # 2 is easy.
first make sure you have a new title screen ready. open rpgmaker xp, and click f10 then go to titles on the left, and click import on the right. now find your title screen you saved somewhere.

now once your done and you see it in red in the right side. press close and now press f9 and go to the tab system..its the last tab..then go to title graphic it should be second option click the arrow and select yours.

DONE!