Removing RAM from HP Elitebook 6930p - iFixit Repair Guide
Solved: Missing RAM slot in EliteBook 8540p - HP Support Community - 1800127
How to replace the drive bay in a HP 2530p - YouTube
HP Laptop EliteBook Intel Core 2 Duo SL9400 (1.86GHz) 4GB Memory 250GB HDD Intel GMA 4500MHD 12.1" Windows XP Professional (available through downgrade rights from Genuine Windows 7 Professional) 2530 - Newegg.com
CMS 8GB (2X4GB) DDR2 6400 800MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Elitebook 2530P, 2730P, 6930P, 8530P 8730W - A41 at Amazon.com
Solved: 2540p memory upgrade - HP Support Community - 1678365
CMS 4GB (1X4GB) DDR2 6400 800MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Elitebook 2530P, 2730P, 6930P, 8530P 8730W - A42 at Amazon.com
2GB [1x2GB] Memory RAM Upgrade for the Compaq HP EliteBook 8530p, 8530w, 8730w | eBay