C:\Program Files\NetBeans 6.0.1\etcの中にあるnetbeans.confをメモ帳にぶっこんで
# ${HOME} will be replaced by JVM user.home system property
netbeans_default_userdir="${HOME}/.netbeans/6.0"
# Options used by NetBeans launcher by default, can be overridden by explicit
# command line switches:
netbeans_default_options="-J-client -J-Xss2m -J-Xms32m -J-XX:PermSize=32m -J-XX:MaxPermSize=200m -J-Xverify:none -J-Dapple.laf.useScreenMenuBar=true"
# (Note that a default -Xmx is selected for you automatically.)
# If you specify the heap size (-Xmx) explicitely, you may also want to enable
#（抜粋）

を
# ${HOME} will be replaced by JVM user.home system property
netbeans_default_userdir="${HOME}/.netbeans/6.0"
# Options used by NetBeans launcher by default, can be overridden by explicit
# command line switches:
netbeans_default_options="-J-client -J-Xss8m -J-Xms128m -J-XX:PermSize=128m -J-XX:MaxPermSize=800m -J-Xverify:none -J-Dapple.laf.useScreenMenuBar=true"
# (Note that a default -Xmx1024m)
# If you specify the heap size (-Xmx1024m) explicitely, you may also want to enable
# （抜粋）
に変えました。