Here are SNAP Intel supported chipset:
...
0 10EA:2000 igs.drv.Mar.19.2000.17.37.36 ; InteGraphics CyberPro 2000
0 10EA:2010 igs.drv.Mar.19.2000.17.37.36 ; InteGraphics CyberPro 2010
0 8086:7121 i810.drv.Jun.20.2002.18.18.00 ; Intel i810
0 8086:7123 i810.drv.Jun.20.2002.18.18.00 ; Intel i810/DC100
0 8086:7125 i810.drv.Jun.20.2002.18.18.00 ; Intel i810e
0 8086:1132 i810.drv.Jun.20.2002.18.18.00 ; Intel i815
0 8086:2562 i845.drv.Jul.31.2006.14.58.46 ; Intel i845G/GL/GV
0 8086:3582 i845.drv.Jul.02.2004.12.12.13 ; Intel i852/i855 GM/GME
0 8086:2572 i845.drv.Jul.31.2006.14.58.46 ; Intel i865G/GL/GV
0 8086:2582 i845.drv.Jul.31.2006.14.58.46 ; Intel i915G/GV
0 8086:2592 i845.drv.Jul.31.2006.14.58.46 ; Intel i915GM/GMS
0 8086:2772 i845.drv.Jul.31.2006.14.58.46 ; Intel i945G
0 8086:27A2 i845.drv.Jul.31.2006.14.58.46 ; Intel i945GM
0 8086:7800 intel.drv.Feb.13.2001.16.35.28 ; Intel i740
0 003D:00D1 intel.drv.Feb.13.2001.16.35.28 ; Intel i740 PCI
...
You'll find it into "graphic.bpd" file which is under /os2/drivers/SNAP after installation
Probably the installation will work but reboot will not.
My suggestion would be to try zapping this file for the i945GM entry due Intel id for i945GM/950 is : 27A6 (and not 27A2) resulting into a line like that:
0 8086:27A6 i845.drv.Jul.31.2006.14.58.46 ; Intel i945GM/950
(this is a supposition only

)
Found PCI database :
http://www.pcidatabase.com/vendors.php?sort=id