Increase the number of connections

Since the main window is a browser window, the number of total connections (images, XHR requests) that the window can keep open at the same time is severely limited (to 3 in Trident, I believe). Is there any way I can increase this limit, of number of connections open to the PHP backe d of the local server, via an HEScript variable or command?

ExeOutput for PHP version 1.6, Trident engine.

No, there is no way to change that.