First, its VTEC
Second, for tuning ur ecu, id say just go w/ uberdata cuz its a free program.
However, ur not goin to be able to use either one w/ that itr ecu since its obd2 unless they made pre 95 itr's which i dont remember. Both uberdata and Hondata both are only for obd1 ecu's, well and hondata has k pro for the new ones.

You could just get a vafc to do the tuning using ur existing ecu tho and u can set vtec w/ that as well. I think ive even seen a couple of them in the for sale section.