Best picture viewer and music player for folders (subdirectories)?

[Ravenik]

After using N95-1 +6Gb for about a year I find built-in viewers a bit inconvenient due to them not being able to browse folders. So I ask you for names of two applications:
1) Best picture viewer which is able to browse folder, and show pictures with option to move forward/backward (to the next/previous picture in folder while viewing content in full screen
2) Best music player with option to play from folder (directory), and option to move forward/backward (to the next/previous song in current folder).
It would be nice (but not "a must") if these applications could be *launched by clicking on a picture/song in X-plore or other file manager* (like in Windows Vista that I have). Currently when I click on a file in a standard file manager or X-plore, I can see the content, but in order to move forward/bacward one file I need exit viewer and move to the next file in file-manager and click to open next file. Also in all folders with music I need to set "Album" id3-tag to be able to listen to it sequentially. It is especially incoveniet when I have .dcf or .mid or .aac files which do not have "Album" tag under Windows Vista file properties.
I hope my middling english wont prevent you from understanding the essence of this thread.
I look forward to knowing the best apps providing a solution. Thanks in advance for any help.

Regards,
Mark