No.
Copy the .map file to the Outpost2 folder.
You still won't have a playable level though. Use the .dat file with a C++ compiler, and the mission SDK (search the wiki for it) to create a .dll. Copy the .dll file into the Outpost2 folder.
Once both the .map and the .dll file are in the Outpost2 folder, then you'll have a playable level. At no point do you need to repack the files into a .vol file. (Putting them into a vol file is optional, and generally not worth the effort).
Of course this is ignoring just how big of a leap it is for most people to make a working .dll file.