SQL 2008 failover cluster installation issue

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My customer wants to use non-default installatin direcotries but when we get
to that page in the wizard, the first installation path field is disabled and
if you introduce any changes to other installation path you get a phony error
message prompting you to supply some setup command line parameters that don't
exist.

I found the appropriate parameters (/INSTALLSHAREDDIR and
/INSTALLSHAREDWOWDIR), supplied them at the beginning in the command line and
when we get to the appropriate page in the wizard, the field is still
disabled and the supplied parametes ignored.

any ideas about how to fix this?

Thanks!

Camilo

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