Automating Single User Mode

In order to automate regular maintenance on SQL Server (6.5 SP3) I'm trying
to automate the process of putting the database into single user mode without
having to stop/start the process.

The sp_dboption won't allow single user mode while users are still connected
to the database, so I was trying the following script:

DECLARE @to_kill int

/* Declare Cursor */
DECLARE spid_cursor CURSOR FOR
SELECT spid FROM sysprocesses WHERE dbid = 6

/* Open Cursor */
OPEN spid_cursor

/* Loop Through All Table Names */
FETCH NEXT FROM spid_cursor INTO @to_kill
WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status <> -2)
BEGIN
KILL @to_kill
END
FETCH NEXT FROM spid_cursor INTO @to_kill
END

This, however gives a sytax error for the KILL command (it seems that KILL
will not allow a parameter to be passed). I've tried making the @to_kill
variable smallint, int, and varchar without any success.

Is there any automated way way to kill user connections without cycling
the server?

Thanks
Gord T.