Upgrade Sap BO 4.1 from SP01 to SP05 patch 6

Hi friends,

I need to upgrade BO 4.1 SP01 to SP 05 patch 6... Do I need to follow as bellow ?

BO 4.1 SP1 client--> Uninstall client (SP1) --> install bo 4.1 sp05 software-->apply patch

BO 4.1 SP1 server--> Uninstall server ((SP1)) --> install bo 4.1 sp05 server-->apply patch

BO 4.1 SP1 dashboard--> Uninstall dashboard ((SP1)) --> install bo 4.1 sp05 software-->apply patch

please suggest me....

Thanks

Riaz