Hallo and Wellcome!
We are here very benevolent, therefore:
1) Upload your file on whatever file sharing server, but we recommend
these servers - but its not rule, only recommendation
2) Better is upload of all files in one (or more because of size) archive. Type of archive is not "ordered", but recommended is archive, that can open everyone everywhere (ZIP, RAR) on most OS (Win, Lin, Mac)
3) Password is not important, but if you want, you can add password in your uploaded files - BUT you may not forgot add password on your post!
4) If you upload your file somewhere, you'll go to Download Links section on this forum and write NewTopic, where you write some information, link and password (if it present). If you can, better is adding more informationsuch as size of uploaded file a type of file, size and duration of individual audio files, type of these files - and better than better is info about bitrate and etc. If you don't know, how can you take this information, try program named
Music NFO Builder - but this prg. does not support OGG Vorbis
5) With adding to the main site is little problem, because capacity of your server is not "inflatable" - all about these is in Swordfish's hands

6) You can upload all types of music, but recommended is "widespread" formats as MP3, (my preffered

) OGG, maybe WMA - simply all, that can be played on most portable players. (On computer you can play everything, but players is little limited

)
- my opinion is, that you upload WAV, it will be better, if you convert it to other format (eg. MP3) and than upload both - WAV and MP3 - but its "difficult" on time and connection (WAV is "little" more huge format!)
- if your music is in special format and need special codec or player, I recommend the same
And finally - if you adding some your upload, please, add in title name of game and, if you can, file format [MP3], [OGG]... / for better overview.
I hope that I answered all your questions - and we will looking forward your uploads.
MartinezZ
PS: Uff - excuse my "perfect" English

PPS: "Contest question": how many "BUT" is in my post?