You can also do it the other way around and start a program as your normal user from a elevated cmd prompt using the runas command.
If you use the /savecred parameter you'll only be asked for your password once.
For example with your forum name and notepad
or to open a certain file with your program (for example C:\Windows\WindowsUpdate.log)
C:\WINDOWS\system32>runas /user:cniggeler /savecred notepad
C:\WINDOWS\system32>runas /user:cniggeler /savecred "notepad \C:\Windows\WindowsUpdate.log"