Join Date: Feb 2016
Location: Moscow, Russia
Programs: AR, LA, A3, UT, 6R, U6, PS, SU, and many more
Posts: 136
If you have a US Passport, you are entitled (with an invitation letter, you can easily buy it online) to a 3 years long multiple entrance visa, for just 160USD.
I helped a friend and he got it with no hazard. You also need a transit visa to Belarus, and they mostly will want you to buy the full visa if you want to leave the airport, and that's again 160USD. I'd avoid belarus if you can, and go via Latvia/Lithuania to Poland...
I'll try this week to get a transit visa for Belarus and will let you know what they say, and how are the rules.
You mentioned another passport, where is it from?