How to change permissions of read-only file system

Code:

amnesia@amnesia:/lib/live/mount/rootfs/filesystem.squashfs/usr/lib/purple-2$ stat /lib/live/mount/rootfs/filesystem.squashfs/usr/lib/purple-2

File: `/lib/live/mount/rootfs/filesystem.squashfs/usr/lib/purple-2'

Size: 575 Blocks: 0 IO Block: 1024 directory

Device: 700h/1792d Inode: 2651 Links: 3

Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)

Access: 2013-12-09 22:28:24.000000000 +0000

Modify: 2013-12-09 22:28:24.000000000 +0000

Change: 2013-12-09 22:28:24.000000000 +0000

when i try to wget some file into this dir, it says:

Code:

Cannot write to �libskype.so� (Read-only file system).

part of df -h

Code:

/dev/sda1 2.5G 1.2G 1.4G 46% /lib/live/mount/medium

/dev/loop0 892M 892M 0 100% /lib/live/mount/rootfs/filesystem.squashfs

/dev/loop1 205M 205M 0 100% /lib/live/mount/rootfs/0.22.1.squashfs

tmpfs 1013M 0 1013M 0% /lib/live/mount/overlay

Can anyone please advice way to input some file into that directory?

i have amnesia and root rights too (and im noob)

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