XML as part of HTML in different browsers

In one folder are few files
- XML  - file with data
- HTML - file with static text
- XSL  - file for transformation XML data into HTML
- CSS  - CascadeStyleSheet

+-HTML----------------------------+
|                                 |
|  some static text               |
|  blah blah                      |
|                                 |
|  +-XML---------------------+    |
|  |                         |    |
|  | data which are presented|    |
|  | using XSL               |    |
|  |                         |    |
|  |                         |    |
|  |                         |    |
|  |                         |    |
|  |                         |    |
|  |                         |    |
|  +-------------------------+    |
|                                 |
|  some static text               |
|  blah blah                      |
|                                 |
|  +-XML---------------------+    |
|  |                         |    |
|  | data which are presented|    |
|  | using XSL               |    |
|  |                         |    |
|  |                         |    |
|  |                         |    |
|  |                         |    |
|  |                         |    |
|  |                         |    |
|  +-------------------------+    |
|                                 |
|                                 |
|                                 |
+---------------------------------+

Sample of this problem can be founded at http://www.open.hr/~ekonerg/xml

When I browse it with 
- IE6   - it works fine
- opera          - NO
- Netscape 6.2   - NO
- Mozilla FireFox- NO

I made it with MS IE 6.0 but I want to be browsable with other web browsers.
Idea is to put it on CD (some kind of CD Catalog) and make posible to anyone 
who has any kind of web browser to view context.