MPQ

[Bill Gates]

what do al he tage mean like .doo .j .w3t ...... things like that

[Unscrewed_Magic]

.doo is the unit data

.j are the triggers compiled into JASSII

.wts are all of the strings in your map

.blp are images

.mdl are text model files, can be edited like a text file

.mdx are binary model file, not easy to edit

.wtg is a file for the world editor

[Bill Gates]

so what do i delete if i dont want any heros/items in the game?

[Xantan]

.w3u (units)
.w3t (items)

also they may be in .slk files or information for them may be in .txt files...

[Bill Gates]

i deleted w3u and w3t but its all still their

[Unscrewed_Magic]

just start a new map

export the items and units from the new map

import the items and units into the map you want the items and heroes gone on