Native VHD boot is currently supported only on certain versions of Windows and is disabled on other versions of Windows. This article/tutorial shows how all versions of Windows 7 can be installed and booted from a fixed size VHD using a free driver called Firadisk.
In Windows 7, Native VHD boot is currently supported only on Ultimate and Enterprise versions and is disabled by a license policy on other versions of Windows. This article/tutorial shows how Native VHD boot can be enabled on unsupported versions of Windows 7 as well.
A USB Flash Drive can be disguised as a USB Hard Disk using Filter drivers. This way a USB Flash Drive can be partitioned using the inbuilt Disk Management Tool(diskmgmt.msc) and all the partitions of the USB Flash Drive can be accessed simultaneously in Windows Explorer.
Sometimes you may require only some particular files inside an ISO. So downloading an entire ISO just for a few files is a big waste of bandwidth .Sometimes you may also want to know the contents of an ISO before downloading it.In such circumstances Httpdisk is very useful. Httpdisk mounts an ISO file stored somewhere in the internet to a virtual CD Drive in your computer without downloading the entire ISO file. You can then view and copy the contents of the ISO in your computer.