I wrote this plugin, because I wanted to use TXPs file-handling. You can either pass a file-id or filename to the plugin and it displays the code. More than that, you can pass a file which is not listed in TXPs built-in file handling. And for sure you can write your own code between the plugin-tags. When a file is shown, a download link to the file will be automatically shown below the code. You surely can switch this off by an attribute. Because of the lack of a “notextile"-tag, I recommend to use files, since Textil would mess up your code. The only way around this is to switch off Textile for the specific article or to hack the TXP-code.
<txp:ske_geshi height="300" file="7" />
<txp:ske_geshi download="Get source!" file="mySourceCode.php.txt" />
Detailed information about installation, usage, attributes and fine-tuning can be found at the plugins website.