Can I parse content that has been returned to user by simple cgi script?

[Ruslan U. Zakirov]

Hello!
I want to upgrade my project with implementing some feature.
Project was writen for mod_cgi, but I would like to parse content that
was generated by my scripts to implement something like SSI or
Apache::UCase and etc.
I don't know how to set "stacked handler" after mod_cgi. May be it's
wrong way of doing this?
Could I do this?
Beforehand thank.
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Sorry for my bad English.
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