check out the this link:
http://www.s2ki.com/forums/showthrea...5&pagenumber=2
there's some info in the last post regarding valve lift, duration etc. This is for the TODA Version 2 cams (I would start with these rather than the OEM honda cams if you want to make power)
Differences between s2000 and civic type R head are as follows:
http://alaniztechnologies.com/rsxf20c1flowcahrt.html
might be worth emailing them to find out some more.
on number 4 ya got me, no idea try searching on s2ki.com or better still try posting to the under the hood section on there with details and a link (might drum up some interest). Ultimate Lurker (one of the members) is probably your best bet when it comes to the technical stuff.
hope this helps.