Layout 960.gs fissare larghezza

[aasmdaa]

Utilizzo il layout a questo indirizzo:

http://960.gs/

che permette di creare i blocchi con il grid system.

Dato che il sito deve essere fruibile da diverse risoluzioni (da 1024x768 fino a 1920x1200) utilizzo le sezioni a larghezza totale:

<section class="grid_12"> 

Questo però comporta dei blocchi che vanno bene sul 1024x768 ma troppo larghi alle risoluzioni più grandi.

Utilizzando invece:

<section class="grid_6 prefix_3 suffix_3"> 

Ottengo l'effetto contrario.
Quello che vorrei è che il blocco rimanesse della medesima dimensioni a tutte le risoluzioni e fossero solo le parti inutilizzate (prefix e suffix) a ridimensionarsi al cambio risoluzione.

Esiste un modo per fissare le misure senza stravolgere il layout?

Grazie
ciao

[aasmdaa]

/*
    Variable Grid System (Fluid Version).
    Learn more ~ [url]http://www.spry-soft.com/grids/[/url]
    Based on 960 Grid System - [url]http://960.gs/[/url] & 960 Fluid - [url]http://www.designinfluences.com/[/url]

    Licensed under GPL and MIT.
*/


/* Containers
----------------------------------------------------------------------------------------------------*/
.container_12 {
    width: 98%;
    margin-left: 1%;
    margin-right: 1%;
}

/* Grid >> Global
----------------------------------------------------------------------------------------------------*/

.grid_1,
.grid_2,
.grid_3,
.grid_4,
.grid_5,
.grid_6,
.grid_7,
.grid_8,
.grid_9,
.grid_10,
.grid_11,
.grid_12 {
    display:inline;
    float: left;
    margin-left: 0.99%;
    margin-right: 0.99%;
}

/* Grid >> Children (Alpha ~ First, Omega ~ Last)
----------------------------------------------------------------------------------------------------*/

.alpha {
    margin-left: 0;
}

.omega {
    margin-right: 0;
}

/* Grid >> 12 Columns
----------------------------------------------------------------------------------------------------*/


.container_12 .grid_1 {
    width:6.333%;
}

.container_12 .grid_2 {
    width:14.667%;
}

.container_12 .grid_3 {
    width:23.0%;
}

.container_12 .grid_4 {
    width:31.333%;
}

.container_12 .grid_5 {
    width:39.667%;
}

.container_12 .grid_6 {
    width:48.0%;
}

.container_12 .grid_7 {
    width:56.333%;
}

.container_12 .grid_8 {
    width:64.667%;
}

.container_12 .grid_9 {
    width:73.0%;
}

.container_12 .grid_10 {
    width:81.333%;
}

.container_12 .grid_11 {
    width:89.667%;
}

.container_12 .grid_12 {
    width:98.0%;
}



/* Prefix Extra Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/


.container_12 .prefix_1 {
    padding-left:8.333%;
}

.container_12 .prefix_2 {
    padding-left:16.667%;
}

.container_12 .prefix_3 {
    padding-left:25.0%;
}

.container_12 .prefix_4 {
    padding-left:33.333%;
}

.container_12 .prefix_5 {
    padding-left:41.667%;
}

.container_12 .prefix_6 {
    padding-left:50.0%;
}

.container_12 .prefix_7 {
    padding-left:58.333%;
}

.container_12 .prefix_8 {
    padding-left:66.667%;
}

.container_12 .prefix_9 {
    padding-left:75.0%;
}

.container_12 .prefix_10 {
    padding-left:83.333%;
}

.container_12 .prefix_11 {
    padding-left:91.667%;
}



/* Suffix Extra Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/


.container_12 .suffix_1 {
    padding-right:8.333%;
}

.container_12 .suffix_2 {
    padding-right:16.667%;
}

.container_12 .suffix_3 {
    padding-right:25.0%;
}

.container_12 .suffix_4 {
    padding-right:33.333%;
}

.container_12 .suffix_5 {
    padding-right:41.667%;
}

.container_12 .suffix_6 {
    padding-right:50.0%;
}

.container_12 .suffix_7 {
    padding-right:58.333%;
}

.container_12 .suffix_8 {
    padding-right:66.667%;
}

.container_12 .suffix_9 {
    padding-right:75.0%;
}

.container_12 .suffix_10 {
    padding-right:83.333%;
}

.container_12 .suffix_11 {
    padding-right:91.667%;
}



/* Push Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/


.container_12 .push_1 {
    left:8.333%;
}

.container_12 .push_2 {
    left:16.667%;
}

.container_12 .push_3 {
    left:25.0%;
}

.container_12 .push_4 {
    left:33.333%;
}

.container_12 .push_5 {
    left:41.667%;
}

.container_12 .push_6 {
    left:50.0%;
}

.container_12 .push_7 {
    left:58.333%;
}

.container_12 .push_8 {
    left:66.667%;
}

.container_12 .push_9 {
    left:75.0%;
}

.container_12 .push_10 {
    left:83.333%;
}

.container_12 .push_11 {
    left:91.667%;
}



/* Pull Space >> 12 Columns
----------------------------------------------------------------------------------------------------*/


.container_12 .pull_1 {
    left:-8.333%;
}

.container_12 .pull_2 {
    left:-16.667%;
}

.container_12 .pull_3 {
    left:-25.0%;
}

.container_12 .pull_4 {
    left:-33.333%;
}

.container_12 .pull_5 {
    left:-41.667%;
}

.container_12 .pull_6 {
    left:-50.0%;
}

.container_12 .pull_7 {
    left:-58.333%;
}

.container_12 .pull_8 {
    left:-66.667%;
}

.container_12 .pull_9 {
    left:-75.0%;
}

.container_12 .pull_10 {
    left:-83.333%;
}

.container_12 .pull_11 {
    left:-91.667%;
} 

[aasmdaa]

Direi che una buona soluzione sarà quella di mantenere la section a 12 e fissare la misura del blocco in px con margin auto per centrarlo. Ovvero:

<section class="grid_12">
    <div class="block-border" style="width:800px; margin:0 auto;">
        <form class="block-content form" id="simple_form" method="post" action="<?php echo $_SERVER['PHP_SELF'] ?>">