I am looking for an alternative to SumoMe Welcome Mat

I love Popup Pro, but wished there was a full screen option or template.

I am looking for an alternative to the SumoMe welcome mat, and I think Popup Pro has many of this functionality already, with the only exception being that it has no full screen templates.

I played with custom CSS but was not able to easily modify PopuPro to have a full screen design.

Can you advise if WPMU offers a lead gen tool something similar wo Welcome Mat?

And if not, can you advise how I could create the CSS necessary to have full screen popups in Popup Pro?

Thanks, JB