Using multiple broadband connections without using any special router or software

I have two broadband connections. One cheap connection, which I mostly use for browsing and downloading. Another very expensive connection that I use for voice chat, remote desktop connection etc. Now, using these two connections at the same time required two computers before. But I figured out a way to use both connections at the same time using the same computer. Here's how:

Connect the cheap internet connection that is used mostly for non-critical purpose like downloading, browsing to a wireless router.

Connect the expensive connection that is used for network latency sensitive work like Voice Conference, Remote Desktop directly via LAN.

When you want to establish a critical connection like starting voice conf app (Skype) or remote desktop client, momentarily disconnect the wireless. This will make your LAN connection the only available internet. So, all the new connections will be established over the LAN. Now you can start Skype and initiate a voice conference or use Remote Desktop client and connect to a computer. The connection will be established over LAN.

Now turn on wireless. Wireless will now become the first preference for Windows to go to internet. So, now you can start Outlook, browser etc and they will be using the wireless internet connection. During this time, Skype and Terminal Client is still connected over the LAN connection. As they use persisted connection, they keep using the LAN connection and do not switch to the wireless.

This way you get to use two broadband connections simultaneously.

Here you see I have data transfer going on through two different connection. The bottom one is the LAN which is maintaining a continuous voice data stream. The upper one is the wireless connection that sometimes consumes bandwidth when I browse.

Using Sysinternal's TCPView, I can see some connection is going through LAN and some through Belkin router. The selected ones - the terminal client and the MSN Messenger is using LAN where the Internet Explorer and Outlook is working over Wireless connection.