how to Install Windows 7 on a laptop

Now we can download the Release Candidate of Windows 7 for free from Microsoft and use it until nearly a year. Of course, traditional ways of doing the installation the OS starts to burn an ISO file that has been downloaded to a DVD, which will be used on laptop or desktop. It's easy if you have a laptop or desktop, but what about the netbook, netbooks on the market that much? sold without optical drive.
Fortunately, there are ways for a problem:
1) Buy a USB DVD Drive. This is the easiest solution, and this will facilitate the conduct apaun software installation from a CD or DVD. Prices for USB DVD Drive range from 400,000 to 500,000 in the market.
2) If you have a USB flash disk with 4GB sizes, you can make it become bootable by using open-source software called Live USB Helper. Then use Daemon Tools Lite to mount an ISO file to a virtual drive. do booting with a USB flash disk and do mount an ISO file to a virtual drive from a USB flash disk. Although many menghaiskan it enough time because you do the installation of the flash disk.

3) If you have an External Hard Disk then copy the ISO file to the Hard Disk and do boot from external Hard Disk. This will make the process faster than the latter.