That for the re-t7z your sets. Unzip this into your MAME folder. MAME/t7z.exe. Much easier to find and then drop your ROM's folders onto it.
You will need 7-zip for the clrmamepro. Get that from the 7-zip website. Install it. Change the path that is on the clrmamepro Compressor Properties 7Z to the 7-zip path.