How can I modify tileset to allow ALOT of different tiles...URGENT

I need to be able to import a crap load of tiles other than what is already the default. For example, on ashenvale, i can modify tileset and add an extra tile... but no more... ive seen maps with a shit load of them like 15.. how can i do this? urgent please help.

Get World Editer UNlimited Hhere ->http://www.wc3sear.ch/files/downloads.php?ID=17&l=6

and i think you can add like 4 more tilesets or somthing
when you get it go to advanced and then Modify tileset and there you can switch or add as you like

thats the only way i know of. the only problem is once you modify things using weu than u may not be able to open it up in the original WE if thats a problem for you.

If you only modify the tiles in WEU, you CAN open the map up in normal WE.

i know. i was talking about if you start doing things that u can only do in WEU and other thigns besides tiles. maybe i made that unclear sorry...