Question : Problem: Any way to "unremove" Safely Remove Hardware?

I have a internal card reader with the usual SD, CF, MS and MMC card slots.I sometimes remove the SD slot using "Safely Remove Hardware".  This removes ALL the associated "drive" letters (4). Then I realise I want to use the SD slot again.
Is there anyway I can "unremove" the "Safely Remove Hardware" without having to reboot?

Answer : Problem: Any way to "unremove" Safely Remove Hardware?

I know it is not possible with Windows XP - what OS is it you use?