Most devices that have Unix drivers will also have drivers available for some versions of Windows. Asus lists XP drivers for this board: http://www.asus.com/Motherboards/AMD_Socket_754/K8V_SE_Deluxe/#download
. The K8V-SE Deluxe motherboard is not listed as Win7 compatible (but it's not listed as known incompatible either). To test if this board is Win7 compatible, update to the most recent BIOS, then use a Win7 install DVD to search for drivers and other support. (I know the Windows Update disc confirmed that my WinXP box would support Win7.)
For moving components into another computer, you will need to identify the exact device that you want to move and the slot/interface for that device. For example, since ASUS K8V-SE Deluxe motherboard has an AGP video card slot, it will not fit in a newer tower with only PCIe or PCI slots. If your Win7 tower does have an AGP slot, you may need to look in will amongst the drivers for "legacy cards". Finding an XP driver will be fairly easy. The Windows 7 driver may not exist and Win7 may not run without an external video card (if it can load at all).
I hope this helps. If you are looking at a different motherboard or wish to check specific components, please add a comment with the make and model of those parts. I'll be glad to try to find additional information. Include in your comment whether the Win7 tower is/will be running Windows 7 32-bit or 64-bit. Drivers for the 32-bit Windows are more common since they don't need the signature. (To check if a Windows machine is currently running Win7 64-bit, click Start > Control Panel > System and Security > System. If the title ends with x64, it's the 64-bit OS. Otherwise it's the 32-bit version.)