Fix “the installation source for this product is not available. Verify that the source exists and you can access it”

Use Windows Installer Cleanup Utility

OR
Reinstall windows installer

OR
Upgrade the windows installer

MAC – Reset office 2008 serial

I use a time machine backup to build MAC’s for our employees, saves me time on install and configurations, however our MAC users use office 2008 and require a unique key from our licensed copy. to re enter the office serial I just run the following two commands in terminal :

rm "/Applications/Microsoft Office 2008/Office/OfficePID.plist"
rm "~/Library/Preferences/Microsoft/Office 2008/Microsoft Office 2008 Settings.plist"

and re launch office.

MAC – Change default umask in Snow Leopard

echo "umask 002" >>  /etc/launchd-user.conf.

reboot

Read more about it here: apple kb

CentOS 5.4 – install oracle client

oracle install will need :

yum install xorg-x11-deprecated-libs

CentOS 5 – add dag repo

rpm -Uvh http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm