It can be if its coded to? Dunno about the files that you are using..
AND please, SQL > Access.
Access 2000 has many restrictions in comparison with SQL Server 2000 and cannot be used in the case you want to build stable and efficient system with many concurrent users.
If you need to make a scalability, security, and robustness system, you should use SQL Server instead of Access. Because Access 2000 does not support atomic transactions, it does not guarantee that all changes performed within a transaction boundary are committed or rolled back. SQL Server is integrated with Windows NT security, but Access is not. Access 2000 databases cannot be restored to the point of failure, when SQL Server databases can be.
Access 2000 database is only sufficient when you need to store a small amount of data in a single user (or few users) environment, or when you have very low resources, such as memory or disk. In other case, use MSDE or SQL Server.
And with everyone thinking they need a dual/quad core, 4-8gig ram machine to host mir, then sql most definatley.