How to upgrade firmware

i have a :bow: JVC DVD/CD/VCR combo model #HR-XVC25U how do i upgrade to firmware. i can play bit and pieces of the DVD+RW movies :confused: . i think my firmware need to be upgraded. i have tried of sorts of disk and these are the only ones that seem to work so so. any help? :doh:

http://www.videohelp.com/dvdplayers?DVDname=HR-XVC25U+&Submit=Search&Search=Search&dvdportable=&dvdchanger=&dvdtv=&chipset=&country=&orderby=Name&hits=25

Above link might help, but I donโ€™t think your player will handle +RW. Also, other than NECs, most burns from other burners om RW discs are just average quality. A lot of players have trouble and the JVC is just average.

You could check JVCโ€™s website.

thx, for the help iโ€™ll try that.

verbatim dvd+r 16x works very well