has anyone tried to find and replace a string in webodf?

After opening the document I need to find a specific string and replace it with a large amount of text.

User fields (defined in the document) is not an option as it ignores carriage returns.

A possibility would be to position the cursor (and select) the string I am searching for and the paste my data (maybe with PasteController) but I can't find anything that positions the cursor on the text I'm looking for.

Can anybody help?

Thanks so much,

Helder Gramacho

Portugal