Plugrush Popunder

I'm using the plugrush popunder on one of my sites, and I have installed their WP plugin.
I also have Acurax Popunder plugin, and have put the Plugrush URL in Popunder URL (Don't know if the plugrush popunder work without the acurax popunder plugin)

my main question:
The links that open in a new window from the popunder are coming up front on the screen , which leaves my website behind.
I want to make them to open behind my site, how can I do that?

I know it is possible, because I have encountered with such sites.

Bump, anyone ?
I like to make the popunder like it is on kat . ph (it pops under your current window, not in front of).

First of all: the plugrush popunder works without the acurax plugin. You only need to use acurax if you want to open a second popunder with a cpa offer for example.

There was a discussion about a popunder script here lately, maybe that one works better or the way you want it to "pop". I personally don't know how get that popunder behaviour. The way the popunder shows up might also be different from browser to browser.