How to Install Snow leopard WITHOUT the need of external hard drive or flash card

This way of installing it WON'T erase the existing files on it

IDEA FROM macuserpluscupcake ALL CREDIT TO HIM

You need at least 10 Gb memory to do this.
watch the video for full details
1. open boot camp assistant and make a partition you can adjust how big your partition is i suggest you make it 10 Gb then click partition it will take a few minutes(it took me a while my macbook sucks)
2. now you have ur partition u need the snow leopard.dmg click this link http://thepiratebay.org/torrent/5068890/Mac_OS_X_10.6_Snow_Leopard_(Final_Retail) then use a torrent program and get it i use utorrent
3.now open disk utilities and click the bootcamp tab now click erase sub tab change the format into mac os extended journaled and change the name to snow leopard and click the erase button
4. now click the restore tab click image/source and open ur snowleopard.dmg there and drag ur snow leapard tab into the white box(watch the video it'll be more clear)
5.now click the restore button it should take a few minutes then restart your mac it won't do it automatically
6.hold down the option/alt button while ur mac is starting up and it should give you a choice between 2 thingys now click the snow leopard one
7. now it tells u to choose the language and it'll install this took me 1hour! might take less for you
8.after its done it'll restart automatically and taa daa done
8. now you want to get rid of the partition since u already installed it it's worthless
9.go to disk utilities and change the format to fat and click erase
10. now open boot camp and it gives you an option to get rid of the partition