We all know of Apple's sneaky bashing of the Microsoft's new flagship OS, Windows Vista. The most vocal of them were reflected on Apple's assortment of advertisements, which are pretty witty if you catch our drift.

This time around, however, Apple is taking the war to a whole new level, although this time it gets a bit louder. Yes, because of Vista's launch, Apple has taken upon itself to promote a better option for a PC upgrade: skip Vista and go right over to a Mac.

Think Secret got word that a six-page document had been handed out to Apple's chain of 170 retail stores to encourage sales representatives to point out the advantages that a Mac has over the PC:

• Vista's pocket-burning price tag compared to Mac OS X and iLife;
• Mac's ability to run Windows, including Vista;
• Windows means upgrade hassles, including conforming with high system requirements and the unnecessary need to select a flavor of the OS;
• Similarities in functionality and appearance between Vista and Mac OS X, like the Aero GUI and the Aqua GUI.

If that's not enough, Apple is also drawing up a battle plan to present Vista-themed advertisements in retail stores and distribute similarly-themed T-shirts for Apple employees to wear.