In vegas you can do FILE-IMPORT-*.pproj
This imports the video from the Premiere project into Vegas. But effects applied in Premiere are not transfered into Vegas. And if you have multiple layers in the Premiere project, the order of the tracks changes in Vegas. That’s because in Premiere, the lower track is called 1 while is Vegas the upper track is called 1. So track 1 remains track one but changes from the lower track in Premiere into the upper track in Vegas.
In the past I have played with this import function for AE en PPro projects into Vegas, but I haven’t found any usefull application for it. But if your Premiere project has only one layer and no effects, than you could be lucky
Theo