Extended desktop with 2 LEDTVs and VGA?

Hi everyone,
I really need some help here.
I have 2 40" Samsung LEDTVs with the model UA40D5003BRXXM. They are docked on the wall side by side. Basically i want to achieve extended desktop (not mirroring) for my mac mini (if can). Assume I open a browser 1 on 1st LEDTV, i can drag that browser to the 2nd LEDTV. So i can see more stuff at 1 time.
However I am not using HDMI or DVI as the cables are too short. Based on my contractors, HDMI cable is max 2 meters. So we got them to work on VGA cables. The mac mini and the LEDTVs are quite far away. The cables are already connected below the flooring and hacked into the wall.
So few questions:-
a) how can i connect 2 VGA cables to my mac mini?
b) can I achieve dual LEDTVs for extended desktop here?
If i can't find a way to do it, then i will have to buy non Mac here i prefer mac if can.
Any help? Thanks.

I have never personally used one of these DisplayLink adapters myself. According to their Mac software download page, you can have up to 4 of them on a single Mac. See http://www.displaylink.com/support/mac_downloads.php
I could not find specific mention of whether it supports using them as an extended desktop rather than mirroring, but as they support up to four screens (on a Mac) and mirroring only applies to using two, one can deduce this means extended desktop is supported.
Upate: Ok, the user guide does confirm extended desktop support is included, as well as mirroring.
Note: USB does not have enough bandwidth to drive multiple hi-res screens at the same time, DisplayLink gets round this by using the computers GPU to compress the data before sending it to the DisplayLink interface. They do say it supports playing movies. However I personally would expect that you may see some peformance hit and that the low end Mac mini with just an Intel GPU might struggle.
I could not find system requirements for Mac use other than that it currently is not Lion compatible - just spotted a beta version for Lion so you could use it.
If your VGA cable is not solidly embedded in plaster etc. i.e. is reasonably loose, you could consider (after testing the Cat5 HDMI devices) using the VGA cable to pull the new cable through.

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