There is an entire section on Advantage describing upgrades:
[url]http://advantage.webmethods.com/cgi-bin/advantage/main.jsp?w=0&s=3312716756&targChanId=-536884411[/url]
There is a tool specific to upgrading Enterprise Server components to IS called the “Enterprise Upgrade Utility”. I would suggest reading up on this from Advantage and practicing with some simple integrations to see how it works and then decide if that is the path you want to take. A different option would be to re-write the flows in 6.x.
There is a document on advantage that describes the different ES components supported:
[url]http://advantage.webmethods.com/bookshelf/_webMethods_Enterprise_Upgrade_Utility/6_0_1/Pre-60_Enterprise_to_webMethods_6_Upgrade_Support_Matrix.xls[/url]
It would also be wise for you to search wmusers for “upgrade” . There has been a lot of discussion lately on upgrading and one of the more important topics involves which version to upgrade to (6.1 or 6.5):
[url]wmusers.com
That should answer some of your questions,
Cort
#webMethods#webMethods-General#webMethods-Upgrade#Integration-Server-and-ESB