WAD 7.x vs WAD 3.5

Hi All,

We are having on ABAP stack .

We are using Separate portal ( EP) but not the BI protal for displying WAD ( 3.5) via iviews.

Now are doing upgrade to BW 7.3 and we want to use WAD 7.3 from same EP portal, can we do that by iviews.

Or we have to have BW JAVA stack for executing WAD from EP portal?

Please suggest how we can go ahead with WAD 7.3.

Thanks

Mukesh