Hi,
of course you can. First you need to create the nokia account in maps.ovi.com. And then you have to login with your account.
The route that you want to sync must be saved in your favourites folder. You can just click 'add to favourites' in the web.
Now on your phone you can click your 'favourites' icon in OVI Maps, and then choose 'synchronize....'. You will asked to login first using your previous created account. And that's all. Your route should be already on your phone.
Hopefully help.