Don't make .rar files from .iso files. .iso files are already 100% compressed and it wastes a ton of space and time decompressing them.
1. Download a .rar file
2. Extract it, goes into /temp
3. Copies from /temp into directory
4. Extracts the data from .iso file
You're copying the same data FOUR TIMES. Do everyone a favor and torrent .iso files.
Thank you for your time.