Hi,
I'm glad you've made it work.
Yes, the truth is that this plugin is not easy enough wich explain all the questions here, but I don't have time to improve it and no one seem interested to do it.
I have found how to enlarge the textbox some months ago.
I don't remember what did I change, but here is my full xml file. Compare it carefully with yours, there should be something different, ok ? (maybe the field type)
[code:1]
<?xml version="1.0" encoding="UTF-8"?>
<cbinstall version="1.0" type="plugin" group="user">
<name>Music player</name>
<author>houbahop</author>
<creationDate>2007-17-02</creationDate>
<copyright>(C) 2007 houbahop</copyright>
<license>100% free</license>
<authorEmail>houbahop@gmail.com
<authorUrl>
www.nourl.fr
<version>1.0</version>
<description>
<![CDATA[
<div align="left">
This plugin allow to insert free mp3 files from jamendo.com
Jamendo.com is providing free but legal music files and has thinked a new way to allow unknown bands to get poular.
Thank you for supporting free music!
</div>
]]>
</description>
<files>
<filename plugin="cb_musicplayer">cb_musicplayer.php</filename>
<filename>index.html</filename>
</files>
<params>
</params>
<tabs>
<tab name="Music player" description="" class="getMusicPlayerTab" fields="1" position="tabmain" displaytype="html">
<params>
<param name="hwTabMessage" type="textarea" cols="60" rows="20" label="regexp" default="parameter default txt here" description="this field must be filled with a regular expression that will force users to enter songs from the website you have choosen to allow" />
</params>
<fields>
<field type="textarea" cols="60" rows="20" title="Song code" name="mp_PlayerHtmlString" description="Enter the code for the song here" registration="0" readonly="0" profile="0" />
</fields>
</tab>
</tabs>
<install>
<queries>
</queries>
</install>
<uninstall>
<queries>
ALTER TABLE `#__comprofiler` DROP `mp_PlayerHtmlString`;
</queries>
</uninstall>
</cbinstall>
[/code:1]