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IR transmission is one way in case of TV remotethe tv doesnot sends the data so i guess you cannot do the opposite!
I have updated the Instructable.Also you can finnd the library here
I have updated this instructable, you can find the library here : https://www.mediafire.com/?9qxc9s0c47y94g9also the IRtester and Config_remote files aren't the same first upload the IRtester to the arduino to get the hex code of the number you are pressing,when you get the desired values note them down,open the code config_remote and replace the values which you have got with the ones in the code :)hope that would work!
I have updated the instructable.You can find the library here : https://www.mediafire.com/?9qxc9s0c47y94g9
I have updated the Instructable.Also you can find the library here
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