ok, Thanks! I see the Integration Services installed along with the original installation itself. but not the BIDS i guess.

I managed to find the installation cds for Sql Server 2008 R2 Workgroup edition. but not for Enterprise edition 🙁

would it matter if i try to go ahead and use the Workgroup edition cds to add the BIDS tool onto the exiting Enterprise? or do I need use Enterprise cds only?