How can I increase the disk quota for a directory?

I know very basic Unix commands s I would really appreciate the assistance of a Unix guru.

I am installing an application on a Sun server, when attempting to install I get an error that says I do not have enough space allocated for my install directory (/ACEMS). Error says it has 7235m but needs 15360m. How can I increase the space allowed.

Thanks in advance.

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I have left this thread open for responses.

Thanks
ZB