Lots of ?'s
Don't worry about there having to be an IPAS4-specific version of
skin.axp. ALL IPAS2 and IPAS3 applications (if written correctly) are
upwards compatible with IPAS4. So, there won't have to be a new
version of skin. Re the Autodesk phone number for upgrades, etc…
it's 800/879/4233.