Hello WPN-CTMA,
Hoping that I got your requirment correct, this is what you could do.
In 1 target report, split the various lists on separate pages. Control the rendering of the page using a paramter. Example: Page 1 renders if a value of "1" is passed from the source report, 2 if "2" is passed, so on and so forth. Lets call this Parameter as "p_PageRender"
Then on your dashbaord change:
1)Create 16 "hidden" text box prompts associated with parameters, p_PageRender_1, p_PageRender_2......p_PageRender_16.
2)Have default values populated as 1,2,3,4.....16 for each one of the text box prompts.
3)Lastly, from the drill through link pass the correct value. Example: If your drill through link intends to open page 1 on the target report, pass the value of Parameter p_PageRender_1 to p_PageRender on the target report. If you intend to show page 16, pass the value of p_PageRender_16 to p_PageRender on the target report.
A lot of work, but will get you what you want keeping 1 target report.
-Cognos810