There are 2 types of Intel graphics for Windows 7 which is WDDM and XPDM. WDDM drivers or Windows Display Driver Model display 3D graphical user experience and support aero. On the other hand Windows XP Driver Model (XPDM) only delivers interface that resembles Windows XP and do not support aero feature with other limited functionality. The XPDM drivers available for the following older Intel Graphics:
Mobile Intel® 915GM/GMS, 910GML Express Chipset Family
Intel® 82915G/82910GL Express Chipset Family
Intel® 82865G Graphics Controller
Intel® 82852/82855 Graphics Controller
Intel® 82845G Graphics Controller
Intel® 82815 Graphics Controller Intel® 82810 Graphics Controller
The graphics above is categorize as XPDM while WDDM only available from Intel 945 Express Chipset Family and Above.
Does XPDM Drivers Work With Windows 7?
It will not work, by default Windows 7 will only install Standard VGA drivers which provide basic display. The most common problem is user will not be able to get the maximum resolution and poor gaming performance.
Installing Older Intel Graphic In Windows 7.
There are several Method to install older graphic driver in windows 7. There are no one click setup method. You are require to perform several steps to install it. There are several method you can use to install it. I already wrote the instructions with picture for certain graphic drivers, you can also use the same method and drivers to install you older Intel graphic in Windows 7:
Mobile Intel® 915GM/GMS, 910GML : Tutorial Link
Intel® 82852/82855 Graphics Controller : Tutorial Link
Intel® 82845G Graphics Controller : Tutorial Link
There will be not further development/support for this model which means Intel will not continue to develop new drivers for this graphics either for XPDM or WDDM.