OK i am seeing alot of new people that are posting the same questions over and over that have no idea what to do so i will explain it quickly again for those of you that are new.
1) you will need winrar to open the attached file if you do not have it you may get a free trial version
2)After installing winrar extract the itemtype.rar using winrar by right clicking the rar file and selecting extract archieve or simply double clicking the rarfile works also and after extraction you will end up with a file called itemtype.dat
3) copy/paste the itemtype.dat into C:/ProgramFiles/Conquer 2.0/ini and restart your clients.
NOTE: if when you copy/paste the itemtype.dat to the ini folder in the path i have shown and it asks to overwrite the existing file say yes ( backup old file if you wish )...However if it doesn't ask to overwrite then you have pasted the file in the wrong place.
I hope this quick tutorial helps you.