Hi Tapio,
I am quoting the obvious but as it says below 'choose file'...
"Allowed file types: brn, doc, dwg, dxf, exe, fla, gif, grab, igs, jpg, Lcam, lset, M1s, m3p, mcc, mpg, msi, nc, ods, pcm, pdf, PNG, png, pst, rar, set, shp, swf, tap, tif, txt, vbs, xls, xml, zip
Maximum attachment size allowed: 6000 KB, per post: 4"
Tweakie.