diff -Nur -x '*.orig' -x '*.rej' booty-0.44.4/bootloaderInfo.py mezzanine_patched_booty-0.44.4/bootloaderInfo.py
--- booty-0.44.4/bootloaderInfo.py	2007-05-17 22:25:24.000000000 -0600
+++ mezzanine_patched_booty-0.44.4/bootloaderInfo.py	2007-05-17 22:23:04.000000000 -0600
@@ -727,10 +727,36 @@
         f.write("#          initrd %sinitrd-version.img\n" % (cfPath))
         f.write("#boot=/dev/%s\n" % (grubTarget))
 
+        nthreads = isys.acpicpus()
+        if nthreads == 0:
+            # this should probably be table driven or something...
+            ncpus = isys.smpAvailable() or 1
+            nthreads = isys.htavailable() or 1
+            ncores = isys.coresavailable()
+
+            if ncpus == 1: # machines that have one socket
+                nthreads = nthreads;
+            else: # machines with more than one socket
+                nthreads = (int(nthreads / ncores) or 1) * ncpus
+
+        xenkernel = 0
+        if os.path.exists("/proc/xen/capabilities"):
+            xenkernel = 1
+
         # get the default image to boot... we have to walk and find it
         # since grub indexes by where it is in the config file
         if defaultDev == rootDev:
-            default = 0
+            for kernel in range(0, len(kernelList)):
+                default=kernel
+                version=kernelList[kernel][2]
+                if version.find('xen') >= 0:
+                    if xenkernel:
+                        break
+                elif version.find('smp') >= 0:
+                    if not xenkernel and nthreads > 1:
+                        break
+                else:
+                    break
         else:
             # if the default isn't linux, it's the first thing in the
             # chain list