Once you have added your 2g of memory I suggest you change the virtual memory size for optimized performance. The T43 came with a small virtual memory custom size not really appropriate for the now 2g of memory. For that go to 'My Computer', 'View system information', 'Advanced' Tab, press 'Settings' button under Performance then 'Advanced' tab, press 'change' button under Virtual Memory and select 'system managed'.