Hi Lasso
Given the extent of changes between the 3.0x and 3.2x development branches, styles need to be re-written instead of being upgraded.
It would be better to find a 3.2x style that closely resembles your design, or, attempt to re-colour prosilver 3.2x to look visually similar. Also worth noting that your current style is based on the subsilver style which is no longer supported by phpBB or included in the download file, so it will be difficult to find another table-based layout compatible with 3.2
Sorry this probably isn't the reply you were hoping to receive