On reflection, although the proposed operation seems like a complete waste of time to me, to the question 'Why?' a person could answer 'because it's there'.
Odds on success? let's say 20% on, for a lot of effort.
And I assumed the BIOS would already have been flashed to whenever the last update was issued.
Bear in mind though that as I briefly mentioned above motherboards from that period will almost certainly have a triple layer pcb track layout and possibly a quadruple. This means that each component leg will go through a 'tube' and be connected to three or four tracks.
The solder will fill each tube and attach to each track, making solder extraction very difficult.
If this operation were done in a professional workshop a hot air de-solder device would be used along with a solder suction setup, similar to a small high suction vacum cleaner.
At best the home technician will be blessed with desolder braid and a single suction pump action solder sucker which are not really suitable for a job as complex as removing a DIMMS socket.
I have removed many capacitors from motherboards and even freeing up two legs is difficult.
kystien, if you go ahead, good luck, but don't be too optimistic