Bolero SD Card Track Ordering

Just got my new VRS and loaded lots of music on a 16GB SD card which plays really nicely and loads with minimal delay.

The Artist-->Album--> Track folder/file structure all works fine, but the only thing is within an album it seems to dsiplay/play tracks in alphabetical (or alphanumerical) order of their names rather than the original track order from the album.

The files are mostly WMAs ripped from my CD collection using WMP, and I know they are correctly tagged with track numbers as they play in the "right" order on my Creative Zen MP3 player.

In some cases the file names are proceeded by the track number (like "01_Trackame.wma") and these of course order as desired, but to rename all the files named like that would be a little tedious to say the least

Any suggestions? Is there a bit of freeware out there that could do this automatically perhaps? Or am I missing something simple?

Sorry if this has been covered before, I did try a search first.......

PS Also now regretting buying a blue SD card. I think a respray is needed.....silver or black?