Hehe, I must pipe in here and say, a VTEC where you feel VTEC isn't optimal. Wouldn't you rather have power under the curve hit VTEC and continue to climb. Tell you what, look at this tune I did for Spec A a year or two ago for the BB6 demo car:

Show me where VTEC kicks in :-) Because it's there - just don't feel it. This is also, if you were to line up against a bone stock H22. The fastest stock H22 on the road. That's 104 hub kw, add some tyres and a non strict dyno like most run on and you're looking at 110+ at the wheels ;-)
If you really want to read the original post, do so here:
http://www.jdmimport.co.za/performance-builds-and-projects/toyama-racing-spirit-tuned-honda-prelude-1643/In terms of the S2 parts, they do work, I've worked on a few B16's running the Pro series and they ... move.