well a normal 10mb txt file can be easily compressed to 1mb .
I guess all these language files/folder wld also have been compressed to 1/10 of their size = 5gb
Thats 'cdimage'.
That is called Optimization. You can do this in Magic ISO. There are a certain set of files common between the versions. They are physically present only once, but they are referenced many times. When you make a copy of it, the files are copied physically multiple times.
See all those All-In-One disks on warez sites? Multiple versions of Windows, VS etc. etc. They are made the same way.
IMHO thats UnlikelyNope, Its the method which Infra_red_dude mentioned
Wikipedia rulzAn example of lossless vs. lossy compression is the following string:
25.888888888
This string can be compressed as:
25.[9]8
RLE^^lzw ??
^^lzw ??
wtp??![]()