Xteq X-Find is a great program to find what you are looking for. Simply select where and what it should search and press "Go"; that's all you need to do. You can even specify a text that it should find inside the files.
After the requested files have been found, select one and X-Find will display it in the same window (no additional program is started).
X-Find is also able to highlightthe searched text when viewing the file.
