I've become very accustomed to my mac's apple command location for copy paste operations etc. I'm back and forth between windows and os x and a few times an hour. Windows has something called Scancode keys built in (but not really); this will let you switch the positioning of your alt and ctrl key to act like an apple layout.
Warning!! This is not for novices. DCE is not responsible for you screwing up your registry. Modify your setting at your own risk.
That being sad, it't not that difficult, just protecting my ass. From the start menu open run and type regedit and hit enter. When you're inside regedit goto
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout
When your in Keyboard Layout make sure your not in Keyboard Layouts (notice the s for plural). Right click within keyboard layout and create a new Binary Value. (see the image for example) Name your REG_BINARY value to Scancode Map and right click to modify binary data.
For value data you need to input each code individually, no copying and pasting. Enter 00 00 00 00 00 00 00 00 03 00 00 00 1D 00 38 00 38 00 1D 00 00 00 00 This will swap the alt with the ctrl key. See the image for an example. Click OK and restart windows.
If done correctly you will be ctrl tabbing through your programs or alt tabbing .... Some good advice is to stop looking at your keyboard or the Key Labeled CTRL functioning as ALT will mess with your brain.
If you hate the way this works just go back into regedit and remove that Scancode Map key, restart, and back to normal.
Here are the resources DCE used if your interested in modding your keyboard more or want to know why this works:
