Yes it's in the shell32.dll in system32, you will need to use a resource hacker to open it and then you can replace it with your own, you may need to take ownership of it and give yourself full permissions to be able to save it.
System Manufacturer/Model Number Home Brew OS Windows 7 Ultimate Vista Ultimate x64 CPU Core 2 Duo E8500 3.16Ghz @ 3.8Ghz Motherboard eVGA 750i FTW Memory 2x2Gigs Patriot PC2-6400 LL Graphics Card Inno3D GeForce GTX260 216 SP Monitor(s) Displays ASUS VW222U 22" 2ms Response time Screen Resolution 1680x1050
Keyboard Logitech G15 Gaming Keyboard Mouse Logitech G9 Gaming Mouse PSU HYTEC 600W & Thermaltake 650W Toughpower Power Exp Case Thermaltake Armor LCS (Liquid Cooling System) Cooling Liquid Cooling System Hard Drives SATA 150GB
SATA II 250GB
USB IDE 750GB Ext.