You should be able to execute this from EM to create the indexes...
CREATE NONCLUSTERED INDEX [FORUM_FORUM_ID] ON [dbo].[FORUM_REPLY]
(
[FORUM_ID] ASC
)
Go
CREATE NONCLUSTERED INDEX [FORUM_REPLY_CATFORTOP_ID] ON [dbo].[FORUM_REPLY]
(
[CAT_ID] ASC,
[FORUM_ID] ASC,
[TOPIC_ID] ASC
)
GO
CREATE NONCLUSTERED INDEX [FORUM_REPLY_ID] ON [dbo].[FORUM_REPLY]
(
[REPLY_ID] ASC
)GO
CREATE NONCLUSTERED INDEX [FORUM_REPLY_R_AUTHOR] ON [dbo].[FORUM_REPLY]
(
[R_AUTHOR] ASC
)
GO
CREATE NONCLUSTERED INDEX [FORUM_REPLY_TOPIC_ID] ON [dbo].[FORUM_REPLY]
(
[TOPIC_ID] ASC
)
GO
CREATE NONCLUSTERED INDEX [FORUM_FORUM_ID] ON [dbo].[FORUM_TOPICS]
(
[FORUM_ID] ASC
)
GO
CREATE NONCLUSTERED INDEX [FORUM_TOPICS_CAT_FOR_TOP] ON [dbo].[FORUM_TOPICS]
(
[CAT_ID] ASC,
[FORUM_ID] ASC,
[TOPIC_ID] ASC
)
GO
CREATE NONCLUSTERED INDEX [FORUM_TOPICS_CAT_ID] ON [dbo].[FORUM_TOPICS]
(
[CAT_ID] ASC
)GO
CREATE NONCLUSTERED INDEX [FORUM_TOPICS_CAT_ID_FORUM_ID] ON [dbo].[FORUM_TOPICS]
(
[CAT_ID] ASC,
[FORUM_ID] ASC
)GO
CREATE NONCLUSTERED INDEX [FORUM_TOPICS_T_AUTHOR] ON [dbo].[FORUM_TOPICS]
(
[T_AUTHOR] ASC
)
GO
CREATE NONCLUSTERED INDEX [FORUM_TOPICS_TOPIC_ID] ON [dbo].[FORUM_TOPICS]
(
[TOPIC_ID] ASC
)
Go