how to re-install custom module in local with sql script

i created a module vendor... i also created a sql script.. bt when i remove my module from site.....then whole thing is fine...

bt when i re install my module then my sql script is not working..... my question is how to re install my custom module with sql script.....

when we remove local module then after removing my i also removed table... bt when i re install whole thing is fine bt sql script is not working

my config..

<?xml version="1.0" encoding="UTF-8" ?>
<config>
    <!-- module configuration -->
    <modules>
        <Webcreon_Seller>
            <version>1.0.0</version>
        </Webcreon_Seller>
    </modules>
    <!-- module configuration end -->
    <frontend>
        <routers>
            <seller>
                <use>standard</use>
                <args>
                    <module>Webcreon_Seller</module>
                    <frontName>seller</frontName>  
                </args>
            </seller>
        </routers>
     <layout>
            <updates>
                <seller>
                      <file>sellerform.xml</file>
                </seller>
            </updates>
       </layout>
    </frontend>
    <admin>
     <routers>
         <seller>
            <use>admin</use>
            <args>
               <module>Webcreon_Seller</module>
               <frontName>adminseller</frontName>
            </args>
         </seller>
      </routers>
 </admin>
 <adminhtml>
   <layout>
      <updates>
          <seller>
              <file>sellerform.xml</file>
           </seller>
      </updates>
   </layout>
   <menu>
      <customer translate="title" module="adminhtml">

         <sort_order>100</sort_order>
         <children>
             <set_time>
                   <title>Seller List</title>
                   <action>adminseller/adminhtml_index</action>
              </set_time>
          </children>
       </customer>
    </menu>
</adminhtml> 

    <global>
        <blocks>
            <seller>
                <class>Webcreon_Seller_Block</class>
            </seller>
         </blocks>
         <helpers>
            <seller>
                <class>Webcreon_Seller_Helper</class>
            </seller> 
        </helpers>
              <models>
          <seller>
                <class>Webcreon_Seller_Model</class>
                 <resourceModel>seller_mysql4</resourceModel>
            </seller> 
            <seller_mysql4>
             <class>Webcreon_Seller_Model_Mysql4</class>
             <entities>
                 <seller>
                   <table>db_vendor</table>
                 </seller>
              </entities>
          </seller_mysql4>
        </models>
        <resources>
        <!-- connection to write -->
        <seller_write>
            <connection>
                <use>core_write</use>
            </connection>
        </seller_write>
        <!-- connection to read -->
       <seller_read>
          <connection>
             <use>core_read</use>
          </connection>
       </seller_read>
       <webcreon_seller_setup>
            <setup>
                <module>Webcreon_Seller</module>
            </setup>
        </webcreon_seller_setup>
</resources>
<rewrite>
    <sellercreate>
         <from><![CDATA[#^/seller[\/]?$#]]></from>
         <to><![CDATA[/seller/seller/sellercreate/$1]]></to>
         <complete>1</complete>
      </sellercreate>
</rewrite>
</global>


</config>