Jeremy,
There's no way for a customer to add a static route, but if you contact support, they can make the changes.
The caveat is that these changes may be over-written in a future upgrade, so when 6.1 or whatever the next version is comes out and you upgrade, you'll need to make that call again.
Static Routes- Another thread on the same thing from long ago, but nicole pauls mentions our Feature Requests section, and it looks like byrona is looking for votes here: http://thwack.solarwinds.com/ideas/1221