Noobish query but oh well....

I am trying to implement TPC-H in Oracle. I downloaded the reference set for it which is a .rar file. The archive contains files in form of *.tbl.[number], *.tbl.u1.[number], *.tbl.u75.[number], *.tbl.u150.[number] and delete.u[1, 75, 150]

How do i concatenate the files to make 1 single .tbl file?

Also, if anyone has worked on TPC-H, then can you tell me how to run DBGEN and QGEN in Windows?