Old school vs New school or universe vs universe battles?Why not both. It's all your choice.
You need version 0.8 to use this! This makes it much easier for people who already got it, because they don´t need to download everything again. step1 - download step2 - open the rar and the open the "crusade 0.8 to 0.9 patch" folder step3 - put all the folders to your other folders and let them be overwritten. PS: Don´t forget to read all the important information on the 0.8 download.