-# Which FAI classes do you want to use by default?
-# Notice: GRMLBASE is recommended in any case unless you *really*
-# know what you are doing; class I386 provides the kernel for x86
-CLASSES="GRMLBASE,I386"
+# Which FAI classes do you want to use by default?#
+
+# Notice: GRMLBASE is recommended in any case unless you *really* know what you
+# are doing; make sure to also use a GRML_* class (for example GRML_SMALL,
+# GRML_MEDIUM or GRML_FULL) to get an according kernel and also select the
+# architecture (I386 for x86; AMD64 for x86_64)
+CLASSES="GRMLBASE,GRML_MEDIUM,I386"