And to reassure you, Nero does not use IMAPI to record so disabling IMAPI will not cause problem on the contrary it will simplify Nero's work (by eliminating interference from IMAPI).
However, I think some media recognition from Windows Explorer are based on the IMAPI service functionnalities. These might not work anymore after disabling IMAPI.
Software Development, InCD Project Manager
Nero AG - Im Stoeckmaedle 18
76307 Karlsbad - Germany
fax: +49 (0)7248 928 299 http://www.nero.com