Sony Ericsson :: W715 Media Player Library Update?

I have Sony Ericsson W715 Walkman phone and I try to find a way to play and view my mp3 files in media player as their folder structure is when I copied them to phone memory card - but have had no luck. The problem is that most music I listen is in a mixed form - lots of folders (witch name i like to see and choose in the player) and each consist about 20 various songs. In player under "Music" menu are items like "Artists", "Albums", "Tracks"... but no Folders. I cannot find any folder that way as "Albums" menu shows album name in ID3 tag but my folder structure is different (in one folder songs ID3 has different album name). So I have like 500 artists, 200 albums, 1500 tracks and no way to find what i want - for example to play one folder contents continuously. Only way I can think of right now seems to change all my mp3 ID3-tag album names same as my folder structure names but that choice is really bad because I don't want to lose original ID3 info and also modifying is really tedious when have to change few hundred folders of songs. So am I missing something obvious or what should I do to enable that simple behavior described above? One more thought - maybe in phone is some config file available where album names are stored and change all album names to folder names in there and not running "Update media" after that?