speex command-line........, quantization of LSFs Options

[audio_geek]

Hi,
I want to use a different codebook than speex for quantization fo LSPs.
While decoding speex uses a function called "lsp_unquant"
/* Unquantize LSPs */
SUBMODE(lsp_unquant)(st->qlsp, st->lpcSize, bits);

I want to use some other set of LSPs here. My question is this that is it sufficient to comment this above line and copy my own LSPs in the st->qlsp variable.....??

If I do only this much, will it decode the file according to my own LSPs(which are basically quantized and unquantized from some other codebook than speex) ????
I am really got stuck here and please help me out....

The other way of asking the question is what I have to do to use my own sets os LSPs in decoding the speex bitstream to the wave file...

[audio_geek]

these lines are in the file "nb_celp.c"
and function "nb_decode"
/* Unquantize LSPs */
SUBMODE(lsp_unquant)(st->qlsp, st->lpcSize, bits);