no, removing ad hoc will not affect your replication.
in 2008, it's a right click with the SSMS object explorer on the server and go to "facets": disable these two items if they are enabled:
Lowell
--
help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!