A question on TREX Web Repository Manager crawler for NTLM IIS sites

We have a lot of Intranet web sites running Integrated Windows Authentication (NTLM) as the security manager. However, I was told by SAP people that the crawler (which craw the web pages through the Web Repository Manager in EP) does not support NTLM authenticated web site. Is there any workarounds that we can do to allow the crawler to access the web pages? Since we want to provide a Federated search service for our users to perform a single search for all of our Intranets.