Attribute support when transferring from Java to HTML in CF9

CF beginner.

When transferring from flash to HTML format, is there a way to control attributes which are not accessible through tags (for example HSCROLL and WIDTH in CFTREE)? Seems like going modifying the Ext JS object is the only way (for example using ColdFusion.Grid.getGridObject) as described in CFML reference but this apparently only works for editable objects. Is this the correct approach? Are there other ways of doing this? staying with a non-HTML format is not an option and so any help is greatly appreciated

Disclaimer: just starting with CF and haven't had a chance to try these things in practice.