I have found a SFV util which can create .SFV Files on r-click:
QuickSFV
http://www.geocities.com/SiliconValley/Mouse/4668
with this you can select some files, r-click --> Create .SFV File --> enter the name of the .SFV File --> OK --> done
If you can add this to flashsfv it would be great. I like FlashSFV more than QuickSFV, dunno why