Partition can be ${dev}$num or ${dev}p$num
--- grub-0.97/lib/device.c
+++ grub-0.97/lib/device.c
@@ -867,6 +867,13 @@
   fd = open (dev, O_RDWR);
   if (fd < 0)
     {
+      strcpy (dev, map[drive]);
+      sprintf (dev + strlen(dev), "p%d", ((partition >> 16) & 0xFF) + 1);
+      fd = open (dev, O_RDWR);
+    }
+  
+  if (fd < 0)
+    {
       errnum = ERR_NO_PART;
       return 0;
     }