I know this is an old post, but I would advise to be very careful with this script.

In bol under indexproperty:

IsPageLockDisallowed

Page-locking value set by the ALLOW_PAGE_LOCKS option of ALTER INDEX.

1 = Page locking is disallowed.

0 = Page locking is allowed.

Script states

IF (INDEXPROPERTY(@idxTableID, @idxname, 'IsPageLockDisallowed') = 1)

SET @sParamSQL = @sParamSQL + ' ALLOW_PAGE_LOCKS = ON, '

ELSE

SET @sParamSQL = @sParamSQL + ' ALLOW_PAGE_LOCKS = OFF, '

This is the oposite and can cause serious performance loss (extra locking).