527. Reprojecting several shape files in a folder with ogr2ogr

Today I received a lot of shape files from Stockholm municipality. The files are all in a local projection, Sweref 99 18 00 and I need them all to be reprojected into Sweref 99 TM. Normally I use the GDAL tool ogr2ogr to reproject a shape file, but it would take all afternoon if I had to write ...