Like I said before, if something doesn't install from the cminstall folder, rename the file to start with the word - update.
CWM6 and TWRP are both recoveries, but TWRP uses the touch screen where CWM use volume up/down to select things, home button to do the selected item and power as a "back" button. I run TWRP on all my devices, but the easiest way to install it would be via Goo manager
(from Play Store). You can tap the menu button in Goo and choose "install open recovery" to replace CWM with TWRP. Recoveries made by CWM and TWRP cannot be opened by the other program.