Making a bootable USB?

i have done lot of looking on google, keep getting varied answers on how make bootable usb os on it..

before start, student @ university , allowed legally download both windows7 , snow leopard/lion.

being said, have downloaded sl , windows 7 (my imac still @ leopard). end wanting have windows , osx on imac.

trying make bootable flash drive (windows downloaded .img , osx .dmg).

found guide on how make bootable usb drive using mac linux:
"we encourage mac users download ubuntu desktop edition burning cd time being. if prefer use usb, please follow instructions below.

note: procedure requires .img file required create .iso file download.

tip: drag , drop file finder terminal 'paste' full path without typing , risking type errors.

download desired file
open terminal (in /applications/utilities/ or query terminal in spotlight)

convert .iso file .img using convert option of hdiutil (e.g., hdiutil convert -format udrw -o ~/path/to/target.img ~/path/to/ubuntu.iso)
note: os x tends put .dmg ending on output file automatically.

run diskutil list current list of devices

insert flash media

run diskutil list again , determine device node assigned flash media (e.g. /dev/disk2)

run diskutil unmountdisk /dev/diskn (replace n disk number last command; in previous example, n 2)

execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskn bs=1m (replace /path/to/downloaded.img path image file located; example, ./ubuntu.img or ./ubuntu.dmg).

using /dev/rdisk instead of /dev/disk may faster.

if see error dd: invalid number '1m', using gnu dd. use same command replace bs=1m bs=1m.

if see error dd: /dev/diskn: resource busy, make sure disk not in use. start 'disk utility.app' , unmount (don't eject) drive.

run diskutil eject /dev/diskn , remove flash media when command completes

restart mac , press alt while mac restarting choose usb-stick"

said, downloaded ubuntu.img, same code work .dmg? can make bootable usb drive of osx/windows mac? can't burn dvd's because superdrive broken.

in advance!

 

it quite simple, pirated version of mac os x, unless can't boot mac os x.
if can, mount dmg file in finder, open carboncopycloner, select mounted mac os x 10.6 snow leopard installation dvd image source , formatted* usb flash memory thumb drive or external hdd target , press clone.
can boot it.

*

how format new hdd install mac os x onto (or make bootable copy onto)​

, if not work, external optical disk drive (odd) connectable via usb , 29 usd upgrade dvd mac os x 10.6 snow leopard.

 

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