I am new to web design and am going to try using different CMS to see which one I like most. I have downloaded, Joomla, concrete 5, expression engine and Dreamweaver. I have already set up a site using Dreamweaver, Wampserver(local) and cpanel. I have installed joomla in the www root folder in WAMP and have it set up. Do i simply do the same for the other CMS's?? If so there will be 4 index.phps in the www folder and I am worried if i change the name(index(concrete5.php)) it may mess with the pages linking to this index. Is it ok to just go ahead and do this or is there an alternative method??

Thanks in advance