Configuring same custom form for multiple message classes in form.cfg file

Hi all,

Just a quick question. I have a MAPI form config file myForm.cfg
which I would like to extend and have the same form be called for
multiple message classes.
e.g. IPM.BLUBB and IPM.FOO

[Description]
MessageClass= IPM.BLUBB

Is there anyway to configure multiple message classes in the same
config file which would use the same custom form. I have many
different ways, hoping that I could assign multiple values to the
MessageClass variable. So far, no luck.
e,g,
MessageClass=IPM.BLUBB IPM.FOO

The duplicated config file is not a problem but getting the exchange
sysadmin to publish the form multiple times for multiple message
classes is definitely a problem.

best regards,
movalgirl