Well I learned from my own experience that one of a relatively safe methods with Xrumer is just to create forum accounts with your website url. Most of forums have ability to add your "homepage" to your profile.

One guy used this method for Google SERPs domination for word "xrumer"

These links live longer (because you don't spam on forums, you just mass creating accounts, but even this may be considered as spam).
I also think these links cannot be used for a long run.