Yeah, that parameter is quite useful for quick testing. tach mentioned all the rest I could point you to^^
Two comments on the "-iinit" parameter though:
- Do NOT use it for Shards. You are circumventing (parts of) the dataserver if you do so, with unpredictable results on overall stability - not only of your client, but also the server side (especially the vault)
- That command-line tool is not MS-DOS

it hardly has anything to do with it, except for the... usability, if you want to call it that way. It's a normal 32bit/64bit windows application. MS-DOS compatibility is not even supported on 64bit systems.