The pins of the nand on the vegas motherboard are too close together to be hand soldered. Even if it where possible to configure the vega to use the xd card ( it probably is.) hand soldering the vega motherboard would be nearly impossible. Heres some picture of the job you are looking at.
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There are 48 pins, on 2 sides, 24 pins in 1.2cm, 2 pins per mm. The clearance between the pins is about 0.2mm.
Not physically possible unless you can do magic with a micro scope and a very small soldering iron.
A better option would be to use the camera usb or the pcie output that exists on the board (used for the sim card/GSM on some P10an01's. Someone (I think it was on xda) was looking to do this mod. He had the sim adapter part so was using the mini pcie socket on the sim card reader to use a mini pcie ssd hard drive. I think he was using it to boot linux but I may be wrong on that.
Even if you dont have the sim card part you could do a similar mod using the output that would be used for the sim card part (on the motherboard). Unfortunately the connector is proprietary so the pin output is unknown and would require testing. If your serious about doing this then you will be better getting the sim card part as testing the pinout would be dificult, this part is prooving elusive though.
Edited by richardmlea, 06 April 2012 - 05:07 AM.