Yes, synapsevampire's way is how we routinely do this in our CR9/CE9 environment - that is, open the report in Crystal Reports, then Save As and save directly to the location of the existing report in Enterprise, using the same name. With CE9, however, there are a couple of potential gotchas that maybe they've addressed in 10:
[ul]
[li]The database password on the Enterprise report object is lost. You must re-enter the password. Also, if the database account last saved with the report is different from what's set up in CE, you'll need to rekey that as well.[/li]
[li]If you entered anything directly into the description field on the Properties tab in CE or into the record or group selection formulas on the Filters tab in CE, this info will be overwritten with the updated report.[/li]
[li]If the report is set with a default format other than Crystal Report, such as Excel, the CMC may still show the format you selected but actually generate the instance using the system default Crystal Report format. This results in instances that show they're XLS format, for instance, but are really RPT format. For reports I have set up like this and then subsequently updated, I usually change the format back to Crystal Report, then click the update button, then set back to Excel or whatever format, then update.[/li]
[li]Any parameter defaults you set up for the report in CE will be overwritten with the CR report parameter values (i.e. if you ran the report before saving to Enterprise, the parameter values you last used will show up in Enterprise.)[/li]
[li]Any recurring jobs will not pick up the updated report logic, so you must delete all existing recurring jobs and recreate.[/li]
[/ul]
All of this applies even if you open the report into CR directly from its location in CE, make your changes, then update it.
Despite these issues, you do get some benefits by saving over an existing report object. The most important one for me is that by avoiding the object delete/republish method, all the historical instances are retained.
--Bearden