Thanks for the help
That mod doesn't look to hard to do my soldering skills are ok but I will get some practice in before I try it out I followed a Ebay link from the post that Atari8warz put up for me cheers for that too and I just want to make sure that these are ok to use http://www.ebay.com/itm/TI-TMS4464-10NL-DIP-18-x4-Page-Mode-DRAM/271387430539?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D27538%26meid%3De12867072746431c8cc51f61ac1e96a4%26pid%3D100011%26prg%3D11353%26rk%3D1%26rkt%3D10%26sd%3D261078481809