Mount a write-protected USB flash drive in write mode

Backup all important data first!

Create a mount point and mount the usb flash drive:
sudo mkdir /media/usb-rw
sudo mount /dev/sdb1 /media/usb-rw

It'll still read-only, so execute following commands:

sudo hdparm -r0 /dev/sdb1
sudo blockdev --setrw /dev/sdb1
sudo mount -o remount,rw /dev/sdb1

voilĂ , now you have a write access to the flash drive, but you shouldn't use it for any important information anymore!

How to get a fan more silent (reducing of a power)

The simpliest way to get a fan more silent - power it with a lower voltage.
How-to: http://www.pcbheaven.com/circuitpages/A_Simple_Way_To_Reduce_A_DC_Fan_Speed/

Rneeded = (Ufan/Uwished - 1) * Ufan / Ifan

i.e. for a fan with parameters 12V / 0,13A and wished voltage of 8V you need a resistor with 46 Ohm
R = (12/8 - 1) * 12/0,13 = ~46 Ohm