Vista - vb script help

Hi All

i have managed to get a script working that installs a font on to a
windows users PC - which is great, except the problem being that i
intend to have this run as a startup script from group policy, and if
you run the script more than once - it complains that:

"the font is already installed, to install a new version, first remove
the old"

i understand its possible with vbs to check for a files existance
before running - could anyone help me in this respect or maybe suggest
an alternative way of doing things (by the way im totally new to VBS,
do not have a clue where to start.

Thanks for your help - script below

S

Const FONTS = &H14&

Set objShell = CreateObject("Shell.Application")
Set objFolder = objShell.Namespace(FONTS)
objFolder.CopyHere "\\192.168.104.225\sysvol\EcoFont
\spranq_eco_sans_regular.ttf"

Reference:
http://www.microsoft.com/technet/scr...8/hey0425.mspx