I don't know a good (easy) way to determine whether your MS-SQL 6.5 is Standard or Enterprise. You can find it, I think in the SQL log file, or at worst in the registry.
You can convert your data using the upgrade wizard (see my previous post). The MS-SQL 6.5 data converts nicely to either SQL 2000 Standard or Enterprise versions.
Jobs don't convert well, due to the radically different model used to support autonomous tasks. I would recommend that you recreate them (it takes very little time).
Stored procedures convert reasonably well, as long as they are "plain vanilla" stored procedures. Some vendors supplied stored procedures in odd forms, some shrouded, some without source at all. Those don't always convert. User written procedures should be no problem at all.