RAZOR Archiver has became a popular compressor here but unfortunately there is no public cls/wrapper for this so it can be used with freearc, so I decided to create a cls for it.
Drawbacks:
Using this cls will inflict final size as it chunks data. You can change chunk size but that may inflict smooth progressbar and create bigger temps, but as longer as you use small chunks or don't care about temps, this cls is fine for using.
You must use this on compression if you wish to use it with decompression.
Enjoy
Update 1.0.1.1
1.Decompression crash fixed
2. Default ini changed to cls.ini instead of cls-rz.ini
3.Temp dirs created by the cls should be deleted now in decompression