changing Japanese car stereo removal etc

Lo all. Against my advice my dad bought a 2001/2 import v70. To be fair it's stunning. 13 years,old but literally like new.

However! , I need to change the stereo for him as the fm is jap I.e up to 99.0

I can't see how you get the thing out? , has anyone a guide and anyone a replacement for an hu-633

Regards

Mas

Couldn't find it via Google easily but nice guide on you tube. So I have a t25 but need a standard replacement stereo

Anyone. :)

Mas

there may well be software available to change the range of frequencies without changing the headunit.