Cannot Set Job Alerts On Notifications Tab If A Non-sysadmin User

Platform: Win2000 SP3, SQL 7.00 - 7.00.1063

I have a SQL-authenticated user with the following permissions:
"Process Administrators" server role
"db_owner" and "TargetServersRole" for msdb database
"db_owner" for master database.

The problem is that when this user opens up any job (i.e. owned by any
user) in the SQL Server Agent, and goes to the Notifications tab, the
first three alerts (Email, Page and Net send) are greyed out, i.e.
these cannot be set.
The other options are available (Write to Windows application event
log, Automatically delete job).

The only way I can achieve this is to give this user the "System
Administrators" server role, i.e. sa.
But this of course gives absolutely full access, which I don't want.
Is there a way for a user to see/change Notifications of jobs which
only he owns?