Here you can find general Downloads, who are new to all this:
For the .rar, .ace files you will need WinRAR to extract the files, To get WinRAR go to http://www.rarsoft.com. You also need the latest most up-to date version of WinRAR to extract the files otherwise it will report that the file is corrupted or a similar error message. You can also use WinAce to extract .ace files. To get WinACE go to http://www.winace.com. Make sure WinAce is the most up to date version as well.