Hi again,
checked with my 602, this is still the old reader without the possibility to use custom fonts.
You can see which version you have by looking at the menu UI. If you have 9 icons, 3 in a row and 3 stacked you have the old version (no custom fonts), if all options are stacked on two different pages it's the new one (with custom fonts).
The better option fo using custom fonts and several other formatting options is to reconvert all EPUB books following the tips in
this thread from the german section (Google translated) and then using either fbreader or CR3 (works very good with non-touch devices)