Install Windows Vista using less than 512 MB of RAM

Everyone know, Windows Vista is resource hungry OS that require at least 512 MB of RAM to install. Here I am introducing a simple trick to install Windows Vista using less than 512 Mb of RAM but I recommed to increase or upgrade your RAM to run Windows Vista simple, easier and faster
1. Boot from Windows Vista DVD
2. Select your language, currency and keyboard setting and click NEXT.
3. At next screen click on Repair your computer and process next to get system Recovery Options.
4. Now click on Command prompt and run setup /nosyscheck and perform installtion.

Rearm Vista Activation period

Would you like to extend the activation period to the maximum 120 days instead of the 30 day period that is set by default? It is possible and legal to do this using the software licensing manager in Windows Vista. Simply run slmgr -rearm to get another 30 days. You can do this a maximum of three times before Microsoft blocks further extensions

Enable support for 4GB of RAM (or more) in Vista 32-bit

On a computer that has 4 GB of RAM, the System Properties dialog box and the System Information dialog box may report less memory than you expect. This problem occurs because the address space is limited to 4 GB in a 32-bit hardware environment. Memory may be relocated to make room for addresses that the basic input/output system (BIOS) reserves for hardware. However, because of this limitation, Windows Vista cannot access memory that is relocated above the 4 GB boundary.
Solution: Open an elevated Command Prompt, type BCDEdit /set pae ForceEnable and press Enter.
The pae parameter enables Physical Address Extension (PAE). On 32-bit versions of Windows, PAE is disabled by default. PAE is an addressing strategy that uses a page-translation hierarchy to enable systems with 32-bit addressing to address more than 4 GB of physical memory. PAE also supports several advanced system and processor features, such as Data Execution Prevention (DEP; "No execute"), Non-Uniform Memory Architecture (NUMA), and hot-add memory, so it is also used on computers with less than 4 GB of memory. PAE must be supported by the processor.
On a computer that supports hardware-enabled Data Execution Prevention (DEP), PAE is automatically enabled when DEP is enabled and automatically disabled when you disable DEP. To enable PAE when DEP is disabled, you must enable PAE explicitly:
Open an elevated Command Prompt.
Type BCDEdit /set nx AlwaysOff & BCDEdit /set pae ForceEnable and press Enter.