RAR files can be uncompressed using WinRAR or 7-Zip.
http://www.rarlab.com/
http://www.7-zip.org/
I personally use 7-Zip, but both work fine. After opening the RAR file with either program, you'll see a .cab file. As austin420 said, this is the file that needs to be copied and then run on your TP2. I personally transfer the files via Bluetooth from my laptop, but you can also do it by plugging your storage card into your PC and copying them onto there or selecting "Use as disk" when you connect the phone to the PC with the USB cable.
Once you get the .cab onto your device, just use File Explorer to find where it's located (usually Storage Card or My Documents) and tap it once. The .cab will start installing and you just follow the prompts.