As I read the article, you would set individual bits, one per drive. The
first (right-most) bit is for drive A, the second for B, and the
twenty-second bit for drive W. Note that while this value can be 32 bits,
the highest six are all zero. The Windows calculator is priceless for this,
if you want to look but not touch. Run it, then, from the View menu, choose
Scientific. This allows conversion between Hex, Decimal, Octal, and Binary,
using F5 thru F8. However, Regedt32 actually lets you view this in binary,
unlike RegEdit, which is cool, so long as you don't mistype. But apparently
it can use fewer bits than 32 or 26. This system currently only uses 8 bits.
Since you have a drive W, yours should list more bit, at least 24, I would
guess.
To turn off auto insert on just drive W, you want a bit mask of
11101111111111111111111111, which is 0x3BFFFFF, or decimal 62914559. See,
the bits are like any other numbers (barring any discussion of big endian
and little endian arguments, which were more interesting in Gulliver's
Travels than they are for this discussion), with the lowest "place" at the
right. So, the first bit represents Z, the second Y, and fourth from the
right, the twenty-second from the left, W.
If you want to play with this safely, and aren't comfortable with RegEdt32,
just paste that value into the Windows calculator in binary mode (F8), the
convert to hex (F5), and there you are. In fact, I lifted the bit map by
taking the hex value 3FFFFFF from the article, pasting it into the
calculator, and converting to binary, which is just twenty-six bits, all
ones. I then copied it into notepad, and change the bit for W, pasted back
into calculator, and converted to hex.