Do really extend existing entry table for prx module?

[ghost_gluck]

subj.

I need to extend sceLibraryEntryTable for existing module and add own functions.
Some questions, what i need to known:
1. Do i can patch sceLibraryEntryTable for any module?
2. if yes - do i can allocate memory in kernel partition and replace sceLibraryEntryTable with new patched one?
3. Where i can find information about patching export tables?

PS. Thanks for reply