An SSDD is supposed to and does swap into the old HDD without anyone being the wiser. HOWEVER you mention a 50 pin connection which means you'll have to find the 1.8 inch form factor for your laptop.
After that, you install your OS of choice.
System: Sony VAIO TX 770P
OS: Win7 or Urbuntu 11.10
Current HDD: Toshiba HDD1584 (MK8007GAH) - 50pin
I am looking to leverage some lessons learned for converting my Sony VAIO TX770P from the TOSHIBA Disk Drive (MK8007GAH) to a KingSpec SSD.