[Wlug] Installfest

I have a request that is sacrilege to the charter of WLUG. However it is driven by the practicality of working in todays IT market place. I have run linux exclusively on my personal computers for quite awhile. My situation has changed and now need to make one of my computers a dual boot with windows. The only way I know how to do this is to install windows first and then linux. This would mean having to restore my current installation from backups which I have not done before. My preference would be to add windows leaving my linux installation alone. I am still a newbie to linux and do not understand lilo and the boot process. Would this be something that someone would be willing to help walk me through? Thanks, Mike