Uhh... to make it simple, no, you can't.

In a longer, more complicated explination: It may be possible, however noone has even tried it to my knowledge. Since it is possible to mount a DOHC ZC head to an EW (aka D15A) block with minor modifications, you can assume it is also possible to mount a SOHC VTEC head to a ZC block with modifications. This makes no sense at all, since there is no benefit. Plus, you would have to use some weird, non-standard timing belt.

Research a little more before you try to sell people crap they don't need.