First it seems that Dell CD's do not contain the "Repair Install" option as per the Internets.
Second, you may find that the "To Repair the selected Windows installation, press "R"" option does not show up no matter what.
A hint was found here: http://www.winvistatips.com/re-windows-2003-repair-option-missing-t770031.html -- which stated :
The option to repair appears only under some conditions.So I booted the CD and chose R - recovery console.
The version has to be the same build number for example.
The path in the boot.ini has to be correct.
The system hive has to be loaded and checked, [...]
I ran fixmbr, fixboot, and most importantly "bootcfg /rebuild" (or possibly bootcfg /scan).
bootcfg /rebuild will allow you to add the system back into the boot menu, which in turn the CD will find something to be able to "R"epair.
You may wish to see if those 3 commands allows Windows to boot on it's own. If not, then boot the CD again and choose
Setup Windows now, Press ENTER
To Repair the selected Windows installation, press "R"
If not, so sorry, you're still screwed.