Hi Tinog and welcome to the Synthzone Technics forum
I'm afraid there is no way to convert KN7000 sequencer files to KN5000 sequence files. The only way to listen to the files on my website, is to access them on the WMA page, where they are in digital audio format and will play directly on your PC, using Windows Media Player.
There is a program called EMC-Styleworks which is able to convert just the Technics Styles from later instruments to earlier instrument format. However, their website :
www.emc-software.de/ does not appear to be operating at present.
There is another website hosted by our Norwegian friend Gunnar Jonny and you can find it here :
http://home.c2i.net/gjgotaas/ There is a lot of KN5000 stuff available on his website. Hope this helps........