Well I currently have installed 64bit windows 7 and like an idiot i downloaded 32bit windows 8. and after i mounted it i got an error.

http://gyazo.com/440c5e08d564106f96f3f4d4633502e4

so i was like ohh damn. that took 2 hours to download. not downloading 64bit now. so i looked in the sources folder and found Setup.exe.

http://gyazo.com/173e334d1f87f96e2ab9179ebb2b5794


if you click on this then there you have it, it starts to proceed the installation.

http://gyazo.com/62177f9ac9ea1efd80fbc54012b1c2cd
http://gyazo.com/e9142d8aa8b7fe545528ab69d08422ff
http://gyazo.com/62c8ca5a78b430591d2be65efe80622d

sorry about the gyazo links but i dont have anything to capture and upload screenies any faster.
hope you all found this helpful. as i couldnt find this info anywhere else.

Booting from installation disk and begin setup is always a good choice.

my usb stick corrupts large files so no matter how many times i try the wim gets messed up.
and i dont have any dvd's hangin around so i choose to isntall from inside windows. i always have. but this is a new laptop its running 64bit im always using 32 bit thats why i accidently downloaded 32 bit.

Well you cant bypass this. If you have 32bit W7, you can only install 32bit W8 through Win7.

Slightly off-topic, but if you're having these problems you've either got a fake USB drive i.e. it's reporting a larger capacity then it has or the drive is on it's way out. Either way I would recommend you purchase a new USB drive, you know it's going to fail at the worst possible time