I think I'm right in saying that if you hook them up to an Opti-pac, using XP, you will not be able to use them simultaneously (for 2 players anyway).
I'm guessing they're 360degree spinner type wheels since you suggested using the Opti-pac, in which case I don't think you can connect them to a dual strike, as these rely on using Pots (not optics). 270degree wheels often use pots tho.
If the wheels you have ARE 360 degree ones, then I'm not sure that it's even possible to use both of these under XP for 2 player games. Maybe u_rebel can confirm/deny this?