first of all I want to apologize for my bad english. I hope you will understand my problems.
I want to achieve a text which looks like flames - I managed it half a year ago but unfortunatly I can't remember how i did it. I've got the svg file with some text, but now I need some other content. You can see a png made from the svg here:

How it's done:
1) Create some Rectangle and create a filter for the fire (see http://chrisdesign.wordpress.com/2008/03/06/creating-real-fire/)
2) Create the text with the inkscape texttool (and duplicate it for Step 4)
3) Combine them somehow --> Here I need your help. Unfortunatly I forgot how I did it!
4) Blur the duplicate and make it grey
5) add a black background
What I tried to make it work:
Make Paths out of text + rectangle and combine them with the pathtools. Unfortunatly intersection (strg+*) could not be performed - inkscape reported "one of the objects is not a path - boolean operation failed".
There has to be something i have to do before the boolean operation - have you got an idea?
If someone need the existing svg for some kind of look things up or so please response, so I can upload it somewhere.
Thanks for your help!
Edit: Applying the Filter on the text fails, too.