The papers on my site are either in gzipped PostScript format (older
papers) or (more recent ones) in PDF format.
If you have trouble with PostScript, I recommend installing
Ghostscript, with the
Ghostview previewer.
Alternatively, you can decompress the .gz file (with any good
archive program, like gunzip or
7-zip),
and then convert the ps file to pdf online
with PS2PDF.