Let's get a SPECCY on it and I'll check if the RAM is in single or dual channel. For integrated graphics this SHALL BE in DUAL CHANNEL or you leave performance in the video area less than possible.
Also check if the BIOS is the latest. Many Dells and others had an update to push the video ram up to the max. Which for the 4 series is very important.
Beyond that, keep reducing settings and effects.
I just bought this laptop for $40, its temporary. It has an Intel Pentium T3200 / 4GB Ram 800mhz. But for some odd reason in vanilla world of warcraft (2004 game) im getting like 12-20 FPS. In drivers it says the display adapter is (Mobile Intel 4 Series Express Chipset Family) If anyone has any solutions as to how i can fix this FPS issue id greatly appreciate it. Thanks!!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic