The M3438G has a MXM III slot. If you can buy a card with MXM III, you might be able to put it into your notebook.
See also here http://www.mxm-upgrade.com/
CPU: Mobile Pentium MMX 233Mhz RAM: 2 x 32MB IBM GPU: NeoMagic MagicGraph128ZV/ZV+/XD HDD: 4,1GB IBM 4200rpm CD/DVD: Toshiba CD-ROM XM-1802B OS: Windows XP SP2